There is not a lot to go on there. Could you give us more of the error in the log (it should at least be telling you which classes are not loading)?
Also, it's often a plugin that has done this - what have you changed recently? Upgrade Jira, new version of any plugins? Changed the workflow to use functions provided by a plugin?
...ollected feedback from users around the lack of shortcuts, and we’re here to address that: In next-gen projects, I miss the keyboard shortcuts badly. This is particularly true on the Board, but also i...
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