Hi ALL,
I have received feedback saying they can not package an OLD pre-update project.
That error means you still have the original plugin installed in your project 2021.0.3 still installed in your project.
You have to untick enable and restart the editor. Go back in find the Bridge plugin. Enable plugin again check the right number in the top right is 2021.0.4.
Restart the editor the NEW plugin is now loaded into your project and it works.
Well, that works for me anyway. The plugin code is enabled on a per-project basis which means you have to refresh the plugin code in your project