Plutonium

Dss0 I don't have any antivirus installed, I turned off the windows defender firewall to see if it worked but the problem continued

Dss0 I tested changing dns to cloudfare, google, open dns and the problem still persists. It's a strange problem as I've been using this same local internet for months to play plutonium and I've never had any complications

I can't log into the launcher or the plutonium website through my local internet, I can only access it through my cell phone's mobile internet.
This error message keeps popping up when i try to log into the launcher: