Problem uploading workflow in cmdbuild

Hi cmdbuild team support
When trying to load a file of type XPDL without errors on the part of the TWE, the application returns the following error, which seems proper to the application. Can you help me?
Error: java.lang.NullPointerException: plan attr not found for key = cmdbuildBindToClass

Log:
"java.lang.NullPointerException: plan attr not found for key = cmdbuildBindToClass
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:883) ~[guava-23.0.jar:na]
at org.cmdbuild.workflow.river.engine.RiverPlan.getAttr(RiverPlan.java:55) ~[cmdbuild-river-3.2-b.jar:na]
at org.cmdbuild.workflow.river.WorkflowServiceRiverImpl.doAddXpdl(WorkflowServiceRiverImpl.java:354) ~[cmdbuild-workflow-river-3.2-b.jar:na]
at org.cmdbuild.workflow.river.WorkflowServiceRiverImpl.addXpdl(WorkflowServiceRiverImpl.java:343) ~[cmdbuild-workflow-river-3.2-b.jar:na]
at org.cmdbuild.workflow.core.WorkflowServiceFacadeImpl.addXpdl(WorkflowServiceFacadeImpl.java:348) ~[cmdbuild-workflow-core-3.2-b.jar:na]
at org.cmdbuild.service.rest.v3.endpoint.ProcessWs.uploadNewXpdlVersion(ProcessWs.java:133) ~[cmdbuild-services-rest-v3-3.2-b.jar:na]
at org.cmdbuild.service.rest.v3.endpoint.ProcessWs$$FastClassBySpringCGLIB$$eea69272.invoke() ~[cmdbuild-services-rest-v3-3.2-b.jar:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685) ~[spring-aop-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.cmdbuild.service.rest.v3.endpoint.ProcessWs$$EnhancerBySpringCGLIB$$b6d77a9a.uploadNewXpdlVersion() ~[cmdbuild-services-rest-v3-3.2-b.jar:na]
at jdk.internal.reflect.GeneratedMethodAccessor356.invoke(Unknown Source) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.cmdbuild.utils.ws3.inner.Ws3RequestMethodHandler.handleRequest(Ws3RequestMethodHandler.java:79) ~[cmdbuild-utils-ws3-3.2-b.jar:na]
at org.cmdbuild.utils.ws3.inner.Ws3RequestHandlerImpl.handleRequest(Ws3RequestHandlerImpl.java:69) ~[cmdbuild-utils-ws3-3.2-b.jar:na]
at org.cmdbuild.utils.ws3.servlet.Ws3RestRequestHandlerServlet.handleRequest(Ws3RestRequestHandlerServlet.java:29) ~[cmdbuild-utils-ws3-3.2-b.jar:na]
at org.cmdbuild.utils.ws3.servlet.Ws3AbstractHandlerServlet.service(Ws3AbstractHandlerServlet.java:97) ~[cmdbuild-utils-ws3-3.2-b.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-websocket.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.cmdbuild.webapp.filters.AsyncJobFilter.doFilterInternal(AsyncJobFilter.java:49) ~[classes/:3.2-b]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.cmdbuild.webapp.security.SessionTokenFilter.doFilterInternal(SessionTokenFilter.java:142) ~[classes/:3.2-b]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:97) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:74) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~[spring-security-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.cmdbuild.webapp.filters.LanguageFilter.doFilterInternal(LanguageFilter.java:47) ~[classes/:3.2-b]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.cmdbuild.webapp.filters.RequestTrackingFilter.doFilterInternal(RequestTrackingFilter.java:169) ~[classes/:3.2-b]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.cmdbuild.webapp.filters.BootCheckFilter.doFilterAfterBootCheck(BootCheckFilter.java:111) ~[classes/:3.2-b]
at org.cmdbuild.webapp.filters.BootCheckFilter.doFilterInternal(BootCheckFilter.java:70) ~[classes/:3.2-b]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.1.10.RELEASE.jar:5.1.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[catalina.jar:9.0.30]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[catalina.jar:9.0.30]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[catalina.jar:9.0.30]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) ~[catalina.jar:9.0.30]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[catalina.jar:9.0.30]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[catalina.jar:9.0.30]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) ~[tomcat-coyote.jar:9.0.30]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-coyote.jar:9.0.30]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) ~[tomcat-coyote.jar:9.0.30]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1598) ~[tomcat-coyote.jar:9.0.30]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-coyote.jar:9.0.30]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-util.jar:9.0.30]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
2020-04-02 13:15:07.492 [req:d982d7] WARN o.c.w.f.RequestTrackingFilter$$EnhancerBySpringCGLIB$$44478e82 - processed request, returned error for requestId = d982d792535845e3c3qiikgp
"
Kind regards

Dear Alex,

I am experiencing the same problem.
Did you already found a solution?

Thanks and kind regards,
Bas