Terminal stuck at error won't accept any commands.

I was trying to install CLI package from github but I messed up during the process and ended up getting this error. It is persistent and won't go away. Terminal wont accept any commands like mkdir, ls, clear screen. To fix this error I ended up deleting the info.plist file for the terminal ( I am not a very smart person) which somehow bricked terminal and it won't start anymore. I decided to download iTerm, and it still launches with the same old error. What am I supposed to do. Please help me .