We are using Waterframe on our NeoForge 1.21.1 server. While me and one of my friends can see the portals without any issues, the others can't see them at all. We all have the same mods and resource packs installed. What could be the solution to this problem?

Youtube its not playing nicely with unnoficial clients (ads concerns and so)
Google Drive got limited for who isn't logged in for like... 10 downloads per day, and google encourages to make login unofficially way harder.
Soundcloud... it was supported by VLC but i didn't shade the compatibility files.

The mods are the same, the server is the same—nothing has changed. YouTube works for me and one other friend, but not for the others. SoundCloud doesn’t work, and Google Drive worked once but then stopped. How can this be fixed?