Panel routes on bad webhost

i have strange problem with client who insists on hosting on horrible cheap host.

Basicaly their hosting structure consists of

.htaccess (that points to subdomains and domains)
The site works only if i set

The problem is panel has no such setting and i cant make panel links work.

I am sure this is problem with how the server is set up (in their docs they state drupal and other cmses having same problems are wrongly programmed php apps).

The problem is that client wants to have site on that hosting (they have more sites there) and i dunno how to solve this.

What exactly is the error message you get? You say the frontend works correctly; is that also true for subpages?

Have you checked file and folder permissions?