Both EU and NA - launches fine but login attempts result either in the server "timing out" or "internal error" though 9 of ten times, it's "internal error" and to contact Support.
Yes, I have tried to completely back out of the game and reinitialize. No, it hasn't worked.
Yes, I've had this issue before - after every recent major server maintenance. No, it's never been explained. And no, I'm not the only one who's reported this type of issue.
Luckily, it eventually sorts itself out, but I'm really tired of paying for ESO (for years) on two accounts to have the game inexplicably inaccessible after the game's been "fixed".