RadoV

Thanks guys for your feedbacks!

After a lot of digging in problems of other people I found a guy who had a similar problem (not the same) and his problem was a DNS record not set up correctly. I checked my domain’s DNS setting and found it! There was an old IP address set in a database of one of name servers, others had a new one, the correct one. The WP had a fatal problem with this inconsistency (sync issue I guess) but reported totally misleading message.

Thanks for your time anyway!