Synapse 3 "Server Access Unavailable - Please Check Your Network Connection"

I have a strong, working network, no VPN active, and Synapse 3 is not being blocked by my firewall. I just want to get Chroma up and running but I can't get Synapse 3 to work because of the issue "Server Access Unavailable - Please Check Your Network Connection".

 

I'm also having the same problem, I've turned off my antivirus, tried making it an inbound rule, tried using wifi instead of ethernet, restarted multiple times, deleted and reinstalled, anything else im missing to do?

 

after digging more i found another solution that might be causing it, i was having problems now its working. if youre connected to ethernet click on the icon and make sure you arent connected to any wifi as well, i was for some reason and disconnected and it let me start installing razer

 

Hm. I clicked on my internet to check, and I wasn't connected to wifi or anything like that, just ethernet, but then I clicked install again and it started installing. Maybe just the power of us collaborating made it work for me, idk. Thanks, lol