- close GOG Galaxy if it's running at the moment

- log in to the Playstation Store (store.playstation.com) through your browser
(if you were already logged in, log out first, then back in)

- after the login open this link: https://ca.account.sony.com/api/v1/ssocookie

youll get something like: {"npsso":"xxx"}
where xxx is the npsso value

(example of what it should look like: https://abload.de/img/npssomcj9f.png )

- open windows explorer and enter the following into the address bar at the top and press enter
%LocalAppData%\GOG.com\Galaxy\plugins\installed\

( https://abload.de/img/localappdataojjbg.png )


- open the psn_{random number} folder and edit the plugin.py file with your favourite text editor

- go to line 64. it sould look like this:
stored_npsso = stored_credentials.get("npsso") if stored_credentials else None

delete everything on that line after: stored_npsso =
then add your npsso value behind it in quotation marks.

it should look like this:
stored_npsso = "npsso value"

("npsso value" is the value from step 3 and should be a 64 character long text consisting of numbers, lower case letters and upper case letters)
(the quotation marks " " are important!)

(example of what it should look like: https://abload.de/img/plugingrjah.png )

- save the changes made to plugin.py and close the file
- restart GOG Galaxy
- try connecting with PSN again