Jenkins can no longer connect to github

One of my developers updated a plug-in which I have now since removed, but I am not longer able to connect to my Github org repos or any other repos. It is essentially saying that is cannot locate my Identity File.

This is the error I am now using when trying to connect:
Warning: Identity file -o not accessible: No such file or directory.
ssh: Could not resolve hostname sendenv=git_protocol: Name or service not known
fatal: Could not read from remote repository.

This is brand new. Our Jenkins instance has been around forever, so no idea what has changed in the config. It appears that it thinks the Identity file is called “-o” or the way it is putting together the command is wrong, but I am not sure where to look.

Any ideas?