Users cannot upload .mp4 or .mov files (possibly any video files at all) via the Media Library or the Video Block on Atomic sites. This doesn't appear to be theme-specific.
Personal Atomic Site Test:
A successful .mp4 upload to an Atomic site.
The following error is shown on upload:
1 file could not be uploaded because an error occurred while uploading.
Not theme specific.
Some (< 50%)
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Thanks for the report
For widespread Atomic-specific things, please be sure to ping @Automattic/reactor, and also @ at-help internally, and possibly post to Atomic Requests as well. Feel free to just start with a ping, though.
Internal discussion: p1661975727174769-slack-C02FMH4G8
Jetpack 11.3beta caused some issues
We reverted back to 11.3-a.11 and issues are resolved.