MicahFlee's installer has Faulty version checking.
You can download and build rmsacks version that has a patch.
I hope that the PR gets accepted soon
The signature verification is also an (know) issue, I believe there is a fix for it somewhere. (Tho, why does my Linux not complain about signature??)
Here is one fix: https://github.com/qorg11/ebin-tor
And here is a post with the same problem and a different fix: https://www.reddit.com/r/TOR/comments/iy9k40/install_error_in_ubuntu_while_verifying_signature/