If you've faced the "Failed to connect to server API error" when launching a dedicated server in Satisfactory, try some of these fixes.

Fortnite frequently experiences maintenance downtimes during patches and game updates. These, unfortunately, often leave the servers temporarily unavailable. Besides this, there are occasional crashes ...

So if you are facing the “failed to connect to server error”, you should check their social media, reboot the game and your router, turn off crossplay, verify the integrity of the game cache ...

Figure B The Compass connection setup screen makes it very easy to connect to your remote server. The only thing you should need to change is the localhost address.