Greek region, Xbox 360 game hubs on Xbox One throw error, can't view achievements! [Please fix]

Hello Xbox Support, anyone here? This is still happening even after the latest update.

Greek account, Greek region. Xbox is not supporting Greek system language for now.

match your xbox one region with your account region

Having us region on your Greek account won't work

I'm having this error as well. i can't view my achievements on the xbox one achievement app and the xbox site.

I'm also having errors on the 360 as well. I unlocked 6 new achievements within last day or so it won't update my game overall gamerscore for the game, so i tried redownloading my profile to the xbox 360 and i don't have my xbox one achievements on my gamerscore.
i tired clearing the cashe on the 360, i did a hard reset on the xbox one and i reseted my router.

This is really annoying main reason i play on the xbox platform is their achievement system and now its not working for me at all. This better get fixed!

Still can't see my all achievements on Xbox one or the Xbox app for Android or Xbox.com. The only achievements I can see are recently played games, but none of my old 360 or One games show up on the list. . I can view my achievements fine on the true achievements
app for Xbox one. I have to boot up an old game for the achievements of that game to show back up. I can view my Xbox 360 achievements on the 360 emulator also.