Unfortunately, it’s possible to create directories with “invalid” characters through PHP, which you cannot delete using FTP or (by extension) the file manager.
The only way to delete such files is with PHP. There have been a number of similar topics about this issue, and I once shared some code to help remove such directories here:
There was also this topic from a few days ago where someone gave some additional suggestions:
And next time, please avoid uploading the bootstrap/cache folder. It contains precompiled configuration that has specific reference to the system where it was built.