Fresh new install working weirdly

hi guys
I can’t figure out what is happening with my fresh new installation of Nextcloud.
It’s looks so messy.
It’s running with Nginx behind a Nginx reverse proxy.
Logs has no errors, neither on frontend nore on backend.

Here is a picture of the display I have :

I already tried to :
downgrade php8.1 to php7.4
modify nginx’s configurations

Thanks for your help guys I’m really stuck

Try on another browser or Ctrl+Maj+Del and erase all the content, or private navigation.

Hi Ecphrasis
I did test all of this even on Internet Explorer same result :frowning:
Same with private nav.