Thank you for your message. I am sorry you are having this problem.
If you are getting this every time, there are several possible reasons. Here are some things to try:
If you are running windows, reset the windows firewall to the default configuration.
If you are running MacOS, look to see if there are any lines in the file /etc/hosts that are "adobe.com". If so, delete them. Be very careful editing this file as changing other lines can cause problems.
If you are running a Mac with Sequoia, try upgrading to the latest OS update to 15.0.1 or later.
Try using an alternative browser. If that works, it is likely a browser extension that is interfering. (you already tried this.)
If you are using a VPN, try using without a VPN.
Try an alternative network connexion. For example, if you are connected to a home network, try connecting to your phone as a wifi hotspot. This can help determine if it is a network issue.
If none of these work, please tell us the OS and browser you are using and the version numbers, and include a screen shot of the error.