I'm seeing the same thing.
I even thought that it had something to do with the 2021 file is started so I deleted it since you know everything will carryover anyway when I open a new 2021 but nope everything was blank and had to start from the very beginning like asking for my name.
Its slow, getting the same error every few mins, and when you think its doing a bit better, you get the same error message again.
I've tried chrome and edge, same thing. Tried on another computer and same thing.
This looks like its an issue on UFile's end and looking at the community posts it has been happening for a few weeks already.
UPDATE: Since I was going to start from the very beginning again anyway, I used UFIle for Windows version instead of UFile Online. It's obvious the problem is with their servers or something and I won't gamble if they'll be able to fix it before this year's deadline. Windows version had no problems at all since it skipped over their server altogether and was able to submit my tax return in the same day.
