You can take a look at this below, it seems that you are experiencing the same issue
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Definitely you need to contact with Atlassian support. They will be able to check what is going on.
Regard,
Seba
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Contact your Jira admin if you are running on server and maybe your IRT department and check the Jira logs on the server.
If this is Cloud related, raise an issue with Atlassian Support.
Then can check the instance back-end.
Here on the community we can help with tool solutions, but not with errors relating to the instance itself.
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