I sended them the same info before few days and how i said early - this is the answer from the provider:

Here is the answer from the hosting provider:

The error is happening because of invalid URL-

http://mikidea.com/%D0%9A%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B8/tabid/59/Default.aspx

After removing the Bulgarian path "%D0%9A%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B8" we could access the site without any trouble-

http://mikidea.com/tabid/59/Default.aspx

You need to correct the path in your DNN settings to fix this issue.

But why it is worked on the local machine? And how is the best way to fix it?

Well, the DB collation on the hosting provider is the same. The encoding should be the same, cause the files are the same.

And this is the info,which the Provider declare too.

And i cant understand where is the problem. For sure, the DB collation is the same.

For the Encoding, this is in the Default.aspx -

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

Any suggestions? Is there another place , where i should declare the UTF8 settings in DNN?

The problem is in the URL encoding, maybe. But i cant find a way to fix it.