I am using Jira Software from 25th Oct 2017, and all of the sudden from 2 days I am getting this error" 500 Sorry, we had some technical problems during your last operation."
Technical details
Log's referral number: a263cf6c-5240-4bf6-8a01-338a3bbbc1dd
Cause
Referer URL: Unknown
java.lang.RuntimeException: javax.servlet.ServletException: Servlet execution threw an exception

Please help me to resolve this issue.
I look for to your kind patronage.
Regards,
Ketan Mehta