Potfolio Items are not found

Hello! Could you please help me with an issue I ‘ve encountered?

I got a pro-pinnacle theme. My portfolio items permalinks give the result that the page is not found.

An example: http://adventure.hginsider.com/index.php//portfolio/austrian-alpine-flying-july-15-22/

I have re-saved permalinks in Settings, but it didn’t help.