There’s no such error message in core Unity code, it might be coming from one of the plugins or packages. Can you try performing simple search, extract your apk, and do search Illegal usage of unity detected in all extracted files, curious from where it’s coming
There are too many files and some files can’t be opened as text, so I don’t have the ability to do this.
I have tested it in an empty project and it still crashes. I also submitted a bug report before, but there seems to be no response.
If the unity editor is download from outside of China, that is what I called “global version”. You may know in China you can only download a special unity editor unless use VPN.