After Upgrade from 6.2.2 to 6.3.4 on Raspi with Nginx "Page unavailable"

Im trying out a bit, but it still wont work.

what ive tried:
i added

SITE_BASE = “https://domain.com
File_Server_Root = “https://domain.com/seafhttp

to seahub.settings.py as mentioned here Unable to use WEB UI in 6.2.5 when switching from fastcgi to wsgi - #11 by Mark_O_Polo

And i tried a “blank” nginx config as mentioned in the manuals but still the same.

If i go to the client and right click on a library to “show in browser” it works.
I am logged in as a client and can see all my data and stuff.
But as soon as i go to the menu and click on “system Admin”, i get the “Page unavailable” again.
If i log out, the same, i get “Page unavailable”.

If i type the domain name, the adress changes to https://domain.com/accounts/login/?next=/
In my opinion the error message also doesnt look like its coming from nginx.
So it seems to me that the server doesnt have the correct root folder for seafile or am i wrong?

ps. after digging several hours on this now, i think its a pity that such fundamental changes are made without giving a proper manual on what has to be changed to get everything working.
The CM is a good thing but im missing some simple examples on working configurations for the mostly used cases like seafile, seafile+https , seafile+https+dav. But thats only my opinion as a non expert :wink: