Hey @s.stadnek96 as @cloonan correctly pointed out, seems like this is an issue in your machine, or your VPN service.
I could normally get the SSL on your domain, and it is valid. You can find a similar question to yours, right over here , try to check your VPN settings, connect to a different random IP, then connect back to your origin, most probably your VPN’s server could run a cached version of your site. Try to open a support ticket to your VPN service provider also.
I would also, reboot my machine, reboot my connection rooter (modem) ,
Try also to directly visit wp-admin (www.yoursite.com/wp-login.php) while connected to your VPN, that way the (VPN) server will get a fresh new copy, because you will request a fresh un-cached page (the wp-admin dashboard)