Export my Drives doesn't create a file

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https://abrp.upvoty.com/b/report-a-bug/export-my-drives-doesnt-create-a-file/
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I go to my drives, click export, I select a range (plenty of data in there!), hit Export, I get the Loading spinner, it disappears, then nothing. No download, also no warning from my browser (chrome on windows).
Tried 2 days ago, and again just now.