Some months ago I had some problems while trying to log in to my thunderbird addons developer console, I exchanged a few emails with the support team of Firefox Accounts I think, and finally they reseted my account or some such and then I could log in correctly. Now it seems the problem is back and when I log in from "https://addons.thunderbird.net/es/thunderbird/" a website with a json like message appears saying "{"detail":"Internal Server Error"}". Just to add some information, the account seems to be alright, meaning that I can log in from "https://accounts.firefox.com/signin" and change configurations freely whithout issue, also I've tried from different browsers just in case.