To help you get this sorted, This format works well for forums like Reddit, Stack Overflow, or a vendor’s specific community hub.

This requires admin access to the license server. If you don't have it, contact your IT department.

Ensure you aren't trying to use a license addendum for the wrong version (e.g., trying to use an 11.3 update on an 11.2 installation). 4. Firewall and Network Connectivity