Entering a comment in Service Desk Ticket causes a js error

[Danyal Iqbal]

Entering a comment (just clicking in the comment box) in a service Desk Project causes a red popup  with following error message:

Failed to load plugin: lists from url http://pinboard.pi.ws:8080/s/d41d8cd98f00b204e9800998ecf8427e-CDN/-59ljgg/78000/ac036d7d3d6d98ea18de432e2d8e1726/2.2.11/_/download/resources/com.atlassian.jira.plugins.jira-editor-plugin:tinymce/plugins/lists/plugin.js

[Danyal Iqbal]

error in the logs:

 2020-05-14 12:12:54,761 http-nio-8080-exec-3 ERROR anonymous 732x27x2 - 10.10.10.61 /s/d41d8cd98f00b204e9800998ecf8427e-CDN/-59ljgg/78000/ac036d7d3d6d98ea18de432e2d8e1726/2.2.11/_/download/resources/com.atlassian.jira.plugins.jira-editor-plugin:tinymce/plugins/lists/plugin.js [o.a.c.c.C.[.[localhost].[/].[file-server]] Servlet.service() for servlet file-server threw exception
java.lang.NullPointerException
at com.atlassian.plugin.servlet.AbstractFileServerServlet.findStrategy(AbstractFileServerServlet.java:56)
at com.atlassian.plugin.servlet.AbstractFileServerServlet.getDownloadStrategy(AbstractFileServerServlet.java:45)
at com.atlassian.plugin.servlet.AbstractFileServerServlet.doGet(AbstractFileServerServlet.java:21)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
... 24 filtered
at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:66)
... 1 filtered
at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:64)
... 11 filtered
at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
... 7 filtered
at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
... 7 filtered
at com.atlassian.jira.plugin.webresource.CachingResourceDownloadRewriteRule$1.execute(CachingResourceDownloadRewriteRule.java:60)
at org.tuckey.web.filters.urlrewrite.RewrittenUrlClass.doRewrite(RewrittenUrlClass.java:61)
... 6 filtered
at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
... 23 filtered
at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
... 23 filtered
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$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)