So, like most, I have been having a problem with the Weasel error code. This is how I fixed it. The Companion App, with PSN, is double logging in. What is happening is PSN is trying to log in to your account constantly. Every time you log into DESTINY, PSN is trying to sign in. I troubleshooted this by signing into my Brother's PSN, played Destiny just fine, and had him log in while I was playing, and what do you know: WEASEL. How do you fix this constant Log in Error for PSN? Go into your settings, Account management, and DEACTIVATE and REACTIVE your PRIMARY Playstation. It would also say to UNLINK your Mobile Companion App. You can do this from logging into your PSN on Bungie.net, and go to settings. UNLINK all Mobile devices. Cheers! Playing Destiny with no WEASEL.