Cover ModuleError

docs/home/guides/wt/wt-03-lib-err-and-fix.md

@@ -24,6 +24,22 @@ I’ve removed some of the lines for space, but have left the important bits:
 
 You can see there that PMM found its config file, was able to connect to TMDb, was able to connect to Plex, and then failed trying to read the “Movies-NOSUCHLIBRARY" library, which of course doesn’t exist.
 
+<details>
+  <summary>I got a ModuleError instead</summary>
+
+  If you see this error instead:
+  ```
+  ModuleNotFoundError: No module named 'pkg_resources'
+  ```
+  Chances are you're using Python 3.12 and skipped the bit above about Python 3.12.
+
+  Type this into your term minal
+  ```
+  pip install setuptools
+  ```
+  Then try the run command from above again.
+</details>
+
 Open the config file again and change "Movies-NOSUCHLIBRARY" to reflect *your own* Movie library in Plex.
 
 Say my Movies library is called “All The Movies", so mine looks like this: