I recently decided I wanted to host a server as I just got some more ram and my pc is plenty capable of running one now. Anyway I have been able to join my server with no issues, but my friends have not. I have looked on many threads on different websites and have done all their trouble shooting but it still does not work. So far I have done all the basic Minecraft stuff like port forwarding, turned of my firewall, checked java's public boxes in control panel, and even disabled windows defender. If anyone knows anything that could help that would be wonderful. One of my friends errors is saying that the version of Minecraft is to old even though the server is in 1.15.1 and he also launched in 1.15.1.