Datapack works perfectly, but the discs are just error blocks despite the resource pack being present in server and in client

the previous version worked fine but after updating it to this version the textures broke

Related to #56? I tested the datapack a long time ago on Aternos but I'll take another look

no for me the music plays its just the textures that completely break

Was your resourcepack from an older version? If so you should re-generate it with the latest version of the app. 1.19.4 changed resourcepacks a little (requires an atlas configuration file) so older resourcepacks will not display their custom textures correctly.

FYI: I generated a pack with 26 discs and uploaded it to an Aternos server and it worked. I used v1.5 of the app, with the "generate packs as zip" and "play tracks from the jukebox" settings enabled. I used the Aternos web UI to create a new server, added the datapack into my world/datapacks folder from the Files menu, and uploaded the resourcepack through the Options menu. After restarting the server, everything worked perfectly.

turns out it doesnt work when used with other uploaded server resource packs, is there a way to fix that?

Not really, I can't predict how other resource packs are going to affect the game. You can give your custom music discs resourcepack the highest priority in the resourcepack menu to try and make sure the custom music discs override other resourcepacks. But there's no way to guarantee compatibility with every other resourcepack out there unfortunately