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
I can confirm this is actually working. Thanks.
I've been waiting for a workaround since the middle of July and it has finally arrived.