Hello @RAOS12
Welcome to the Atlassian community.
The error message that is shown is only useful to Atlassian Technical Support to help them access trace information in the logs for your instance. It is not meaningful to end users or Jira Admins to identify exactly what the root problem is.
Here we are a user community, so we don't have access to those logs or your system. If you can answer some questions for us we may be able to advise you on next steps.
What exactly did you do just before this message appeared? Were you trying to simply edit the Due date field?
Have you retried those steps? If so, do you get the same results?
Do you get the same results if you try a different issue?
Have you tried clearing your browser cache and retrying, or trying the same steps through a different browser app or private browser window?
Have you asked a colleague to try the same steps, and do they get the same results?
Have you reported this issue to your Jira Administrators?
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