Nextcloud webpage deconfigured

Hello, after updating dietpi to version 9.1.1, my nextcloud had this visual bug, do you know how to solve it?

i use ddns proxy reverse subfolder nginx noip. http://myddns/nextcloud
link internal error too http://myipinternal/nextcloud

my setup is mini pc beelink u59 pro x86.

Should be similar to this one Nextcloud theme broken after upgrade v9.1.1

Thank you very much, always very attentive and quick with corrections. :+1: :grinning: