bad interpreter: No such file or directory when running ./algo

[Qifan Chang]

I tried to run algo on my Mac (running OS X 11.4) but got
./algo: /Users/my_user_name/Personal_VPNs/algo-master/.env/bin/ansible-playbook: /Users/my_user_name/Library/Mobile: bad interpreter: No such file or directory error message.

I did follow all the previous steps and had all the required packages installed.
I googled around and couldn't find anyone had the same issue. I don't really think OS X supposed to have a /Library/Mobile directory but there is a Mobile Document directory. I don't know if this has something to do with python versions but virtualenv seems to be running just fine.
Personal_VPNs is just a directory I made.
I am really confused by the error message. Can someone help me with this or point to some directions of what the problem might be? Thanks!