I would check firewall settings with your license server machine.
Make sure there are exceptions for lmgrd, ansyslmd, and ansysli_server.
https://www.youtube.com/watch?v=XIh47MZG__A&list=PL0lZXwHtV6OkRCk-_jQqtA0sTNgTWYB-i&index=15
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