Hi Elliott
thank you for your quick response. My provider claims that server settings are wordpress-friendly. I am confused.
Also I did what you suggested…I created a backup of my .htaccess file and then deleted it and refreshed my permalinks in Dashboard >Settings>Permalinks to see what happens. (I deactivated all plugins while testing). – but there is no change. Is there anything I can do to sort the problem? I will appreciate your direct help as well (I’ll give you all necessary accesses).

Thank you