User can't see/edit his profile

[Nana Kankam]

Hello Community!
the language setting of the user suddenly changed from German to English. To change this, I went to the user's profile but that was totally empty.
Unfortunately, I can't reproduce the I-did-nothing-action of the user. Can anyone help?

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

What do you mean by "the profile was empty"?  Can the user not visit their profile and edit their settings?

[Nana Kankam]

Yes, the entire profile page was empty/blank.

The DB was corrupted.   The value for jira.user.locale was {"locale":"de_DE"}. A change to "de_DE" solved it.