Hi @GabBo_Park,
Apologies for the trouble here! So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Have you tried rebooting your Core machine?
Is there any firewall or antivirus on the Core that could be interfering with the connection to our servers? Try temporarily disabling them and let us know if that helps!