The maximum size for attached files is 4MB for support tickets, and there is some file size between 20 and 40MB where that error you saw starts occurring.
Normally you should get this dialog when you upload a file that larger than 4MB (and you do right now if you upload a 20MB file, for example). Hopefully the web team can fix this soon to avoid confusion like this.
We will take a look at your ticket now! Sorry for the trouble.
Are you trying to attach a large file? We were able to reproduce the issue by attaching a 200MB video and we’ve reported the issue to our web development team. Please try sending the form without any attachments.
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