That may or may not be helpful. Basically, certain mistakes can lead to a second module named "modules" being installed. This is not good, as you should have a "Modules" module installed only. Anyhow, The solution is to back up your database and delete the (lowercase) "modules" entry from the modules table. Then you need to be sure the pn_state of the "Modules" entry is set to 3.
There are better explanations than this, which is why I sent you to search. However, that's the reader's digest version of what you need to find and do. In ANY case, make backups.
Frank
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