This issue is related to eLearning by Mythware*, part of Intel® Education.
Mythware uses a wide range of ports between 5000 and 10000, randomly generated when the teacher program starts.
During installation, Mythware will automatically add firewall exception rules for its .exe file.
When you install eLearning by Mythware, part of Intel® Education, and if Multicast is not enabled in Access Point or Router, a student will fail to find their teacher as Mythware relies on this protocol most.
In case your student can't connect to the teacher, please login to Access Point or Router and enable Multicast.