Files app connect to server

I am running Ipad os. i used to be able to easily connect to a drive through smb connected to my router. But now, this seems to be impossible, errormessage ” operation not suported”.

Sometimes it says, this file already exists. And it shows me the drive under ”shared” but i cant acces it. I have tried to clear all cache from the app and reinstall, but the files app still ”remembers” the connections, how is this possible??

Other apps like Files explorer pro works just fine, but ofcourse NOT apples own app. Big surprise there...

Is there any known solution to this??