coming across the same issue with several games and I don't know how to fix it. It seems I'm not the only one either. I keep getting game crashes and the only error in the log is that it can't find the manifest.
basically:
no '.itch.toml' file in top-level directory
Any idea how to fix this? I'm on Windows 10 CU but I can't seem to get past this issue. The games having this issue simply won't load. They crash upon launch and apparently that is the cause, but I don't know how to fix it.