It´s not loading

[covert sundial]

Looks like maybe?

Are you playing modded? Using the same modpack as the server?

[fresh fractal]

yes

i just added a shader

[covert sundial]

It worked without the shader?

[fresh fractal]

i can try

i bought it about 1h ago

[covert sundial]

This kind of screen usually means you aren't actually running the same modpack as the server.

Like trying to connect to a Better Minecraft 3 server with Better Minecraft Fabric 3.