Hi @Цаплина Алёна ,
Do you have more that was around that error? I find those are rather cryptic and sometimes not that helpful; the key is in a lot of the OTHER stuff when I am trying to solve it.
The log referral number is a reference for your admins and Atlassian to uniquely identify the log the real error was written to.
We can't tell you anything, you need to read your application log file (probably atlassian-jira.log in <jira-home>/logs) to find out what the actual error was.
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