Scene suddenly stopped working in Safari and on iOS

[johnnyunar]

Hi! We have been in touch before. I am the maintainer of the Starlink Simulation based on SpaceKit. Today I found out that it's broken in Safari and Safari-based browsers (iOS). I am getting these errors (Safari 15.1 (17612.2.9.1.20)):

THREE.WebGLProgram: Shader Error 1282 - VALIDATE_STATUS false

Program Info Log: Internal error compiling shader with Metal backend.
Please submit this shader, or website as a bug to https://bugs.webkit.org

WebGL: INVALID_OPERATION: useProgram: program not valid

What could have caused this?

Thanks!