Update README.md (#84)

README.md

@@ -22,6 +22,13 @@ More in-depth information about the features of the add-on are available on the
 - Find the add-on using the search bar and enable it.
 - To point the add-on to the Mitsuba dependencies, either click on *Install dependencies using pip* to download the latest package, or check *Use custom Mitsuba path* and browse to your Mitsuba build directory.
 
+## Common issues
+
+:warning: For versions of blender prior to 3.5, you may encounter the error message `Failed to load Mitsuba package` after installing the dependencies via pip. In order to fix that, you need to run blender with the `--python-use-system-env` flag in order for it to correctly pick up the dependencies. In order to do so, find the path to the blender executable, and in a command prompt run:
+```
+<path_to_blender> --python-use-sytem-env
+```
+
 You can refer to the [Installation & Update Guide](https://github.com/mitsuba-renderer/mitsuba-blender/wiki/Installation-&-Update-Guide) on the wiki for more detailed instructions.
 
 ### Supported versions