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Quote
Wetransfer
Are you using Avast antivirus software and using our service?
Big chance you’ll be having trouble getting your transfers to complete.
One of their latest updates causes our transfers to stall indefinitely. Boo!
Unfortunately, the problem can’t be fixed by us; the bug is not on our side.
To solve this problem, you can either disable Webshield
(You can find it in Avast: Settings: Active Protection: Webshield),
or uninstall Avast completely and install a different antivirus tool.