“reason”: “”, “status”: “500” when trying to log in to the Playstation Store

psn

When trying to log in to the Playstation Store on my PC, I've been getting the below error message for months now (after entering my username & password):

enter image description here

I can log in to the same account on my PS3 with no problems. What's going on?

Best Answer

Based on @Robotnik's hint, the solution turned out to be the offsite cookie filter addon...

By enabling cookies from sonyentertainmentnetwork.com and auth.api.sonyentertainmentnetwork.com, I was able to finally log in.