Here are 2 different clients, one has been in the room for a while and has changed its homebase (right) the left one is new to the room & could not have changed its homebase.
but the left one can open the Window to save the video, but after that also comes an error. because of the inaccurate error message, there is not much you can do with the error.
If you need logs, etc I am happy to help.