If the problem persist and you can't wait for the fix, export to Excel then save from Excel to CSV as a reliable workaround.
Hello @Ankur Singhal
Actually, there are currently some incidents going on, including search-related ones, so I would advise waiting it out.
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We can not reach your organization's Jira.
Please share if there is any error code or more details.
This page may help you: How to fix "We couldn't export your issues. Refresh the page and try again" error during export operation
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