Hi Konrad,
Welcome to the Box Community, I'm happy to help!
Can you follow the steps in this article to 'Manually Reset Box Drive' on your Mac: https://support.box.com/hc/en-us/articles/360043697494-Using-Box-Drive-Basics
If the issue persists, please let us know so we can furher investigate and provide more troubleshooting tips!
Best regards,
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