I am not quite sure what to do. I only have .typ, .png, .jpg, .jpeg, .bib and .svg files in my project. Everything worked fine the day before yesterday, but I can neither push or pull using Git.
I’m facing the exact same issue. I disconnected the repo, deleted the github repo and made a new one and reconnected which worked. Edited only one file and as I wanted to push or pull I got the same error message as you. This is very unfortunate as I just bought the pro plan to have the online and offline sync ability for my (soon due) thesis.
I am sorry to hear that!
I have not yet found a solution, and am still experiencing the problem.
(I am also in the exact same boat, having bought the pro plan to sync my bachelor’s thesis)
In the meantime, I’ve had to manually push my changes to GitHub (downloading the files). However, when I now tried to pull the changes from the WebApp, it presented me with some, what I guess are, merge conflicts. Even though I chose to keep all the Typst files (from the WebApp) multiple changes were made to my files, that looked a lot like some kind of corruption. Luckily, I had a backup and have restored it. If you are interested in the “corruption”: https://github.com/ETIMC/Report/commit/9009678c76e9137a592bf87857291c910cf1b312