Merge branch 'master' into 'master'

Add note on `--user` option when installing under Drupal 9

See merge request !42

docs/general/cli-cv.md

@@ -158,6 +158,9 @@ The installer may report a problem. Some common ones are:
     The PHP or MySQL configuration may require an update - e.g. to expand the PHP memory limit, to enable a PHP extension, or to enlarge a MySQL buffer.
     Common issues are discussed in the [Requirements](requirements.md).
 
+??? "Error: Call to undefined method Drupal::entityManager"
+    This error appears installing with the `--user` option under Drupal 9. Avoid this error simply by not using the `--user` option.
+
 For common problems, you can simply fix the problem and re-run the installer.
 
 For unusual problems, be sure to enable verbose output (`-v` or `-vv`). It may also help to [inspect the model, plugins, or requirements](https://docs.civicrm.org/dev/en/latest/framework/setup/getting-started/).