shaders dont work

recently i upgraded my modpack and now distant horizons refuses to work with shaders, like none of them. i even tried downgrading the version. every time the shader fails it gives the "shaderpack failed blah blah" and gives dh_terrain: io.github.douira.glsl_transformer.parser.ParsingException: Unexpected end of file! (1.21, fabirc btw)
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