Why do I get '502 server diconnected' for nearly every requests made?

Never used to have this issue on version 2 but now on 3.0.3-1 I cant make any request nearly withuot that error happening. I think it is a problem with post requests rather than gets.

When working in firefox it throws that error and I can’t pass to another page. I think I tried in w3m too and same problem so don’t think it’s browser specific.

I tried all different modes- like normal mode, socks5 and transparent and non make a difference.

Any clues as to the problem?