UPDATE! Okay, I see where it is happening now, based on the images you have posted above. You are getting the error from the Issues view inside of the project. This is definitely a bug and should be reported.
However, you can click on the Search box in the top nav bar in the upper right.
Then click on Advanced Issue Search
Enter your query there and you should be able to export from that view.
👋 Hi there Jira Community! A few months ago we shared with you plans around renaming epics in your company-managed projects. As part of these changes, we highlighted upcoming changes to epics on...
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