WAD Instalation error (ret = -2011)

I've been trying to install a few WAD game files and get an error at installation. When I install, I get a line that says "Installing ticket... error (RET = -2011)"

I have done some google searches but have not been able to find anything for this specific error. I have tried 4 different files now and get the same error for each, so it doesnt seem to be the file itself. Can anyone help me with this?

Thank you!

Read the error index in the recommended guides section. This is a common error with an easy solution.

Thanks for pointing me to that. I think I may have been a bit too specific in my search. I'll give that a try

Thanks again