if you can log into another account just fine on the same PC and network, then it’s not your connection or hardware. A permanent Tapir error tied only to one account strongly suggests there’s a backend issue with your profile. Unfortunately, Bungie doesn’t allow account-specific support through the forums, so no one here can directly check or fix it. What you need to do is: Submit a support ticket at help.bungie.net, and clearly explain: You can log into other Destiny accounts fine on the same PC. The error happens only on your main account, instantly after login. You’ve already ruled out internet, cache, DNS, overlays, etc. Make sure to mention your Bungie Name (Serenity#4329) in the ticket, not just the post. Hopefully, their support team can dig into your account and find out what’s wrong.