exception in log when creating task

I see logs when a user creates an issue.

2018-01-31 10:59:21,996 http-nio-8080-exec-55 ERROR emp001394 659x428402x2 59u8wh 10.10.17.219,127.0.0.1 /rest/jiraxporter/1.0/permissions/undefined [c.x.j.manager.impl.XporterPermissi
onManagerImpl] Error occurred while checking permission to Export
java.lang.NullPointerException
at com.xpandit.jiraxporter.manager.impl.XporterPermissionManagerImpl.hasPermissionToExport(XporterPermissionManagerImpl.java:109)
at com.xpandit.jiraxporter.rest.services.XporterPermissionsService.hasPermissionSingleContext(XporterPermissionsService.java:76)
at sun.reflect.GeneratedMethodAccessor1112.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
... 19 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
... 1 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
... 36 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 53 filtered
at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:80)
... 1 filtered
at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:78)
... 16 filtered
at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
... 20 filtered
at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
... 10 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 4 filtered
at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
... 7 filtered
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:220)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:197)
at net.bull.javamelody.PluginMonitoringFilter.doFilter(PluginMonitoringFilter.java:85)
at net.bull.javamelody.JiraMonitoringFilter.doFilter(JiraMonitoringFilter.java:128)
... 25 filtered
at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
... 28 filtered
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

Can you think of a reason for that?

Thanks

juergen