Minecraft crashes instantly with shader?

My minecraft crashes as soon as I add a shader…
my specs:
Windows10 Pro x64
Ryzen 5 2600
16GB Gskill Aegis 3000mghz
AMD RX 580 8gb

Have you allocated enough RAM to Mc?

I would always allocate a minimum of 4GB.

Here is a tutorial on how to do it:

Some shaders don't work. Try the Sildurs Vibrant Shader, it should work.

But it still worked yesterday…

I would also allocate more RAM. You have already received a tutorial on how to do this.