Your recent addition of backports.csv to the pgAdmin requirements.txt seems to be causing an interesting problem. Whilst it works fine in a regular Python environment, in the cut-down environment used by the desktop runtime it fails because there is no backports/__init__.py file. This seems to be a well-known, but un-fixed issue in which PIP doesn't install the file as it should.
Any ideas on how we might fix this? Obviously I can just touch the file when building the installers, but that doesn't seem ideal.
