tszcheetah: To use the browser work-around with the current version of the plugin (0.34):
1. Quit GOG Galaxy completely.
2. In your browser log in at store.playstation.com, then go to
https://ca.account.sony.com/api/v1/ssocookie and copy the npsso value.
3. Open C:\Users\<username\AppData\Local\GOG.com\Galaxy\plugins\installed\psn_<guid>\plugin.py in a text editor.
4. Replace line 52 ("return NextStep("web_session", AUTH_PARAMS)" with the following line (make sure to get the indentation correct: there's 12 spaces in front of the line):
stored_cookies = {"npsso": "<paste npsso value from browser here>"}
This line follows the "if not stored_cookies:" line on line 51
5. Save the file, restart Galaxy
6. Go to the settings and reconnect the PSN plugin
This worked for me! Not sure why other folks are having issues.
Has everyone double checked that they maintained the appropriate spacing in the code?