You need to update your configuration appropriately, to not reference things that no longer exist.
This is of course a rather basic and obvious thing to say … but since you haven’t shown this forum what your configuration looks like, it’s not possible for members of the public to predict what the appropriate change would be! Please remember that we cannot read your mind, nor see your screen.
If you want to share multiple files, I suggest committing them to a GitHub repository, and sharing the link here.
If you decide to share further snippets of code in-line, please take note of Welcome to the forum - please reformat your message - I think in what you shared above, you manually edited bits of the message, and as a result, parts of it ended up being interpreteted as italic formatting by the forum software.