Admin module not installed

I have been running the software for over a year. I updated the software recently and now the logs are telling me the admin module is not installed. This gives an Internal error when I try to bring up my web gui. Not sure what happened and I don’t have a back up of the admin module do to data storage failure. What can I do to fix this without having to go through a full reinstall.

How did you install the software?

How did you update it recently?

What is the “internal error” ?

What do you exactly mean by the “admin module”

These info’s always necessary . . . .