No, safari 18.0.1. No file system utilities running.

Yes, file seems to have the correct extension, see attached screenshot.

No, still getting the same "filetype not allowed" message.

A different error now, won't let me upload due to the extension. I tried zipping it, which wasn't allowed either. I tried to rename the extension as p...

I tried to attach it to the original post but it doesn't appear to be working. I was using Safari previously, have just tried again using Brave (and A...