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I get these two (updated now to 1.22).

Shader error in 'Shader Forge/NewShader': 'gl_' : reserved built-in name at line 144 (on opengl)


Compiling Vertex program with DIRECTIONAL SHADOWS_OFF LIGHTMAP_OFF DIRLIGHTMAP_OFF DYNAMICLIGHTMAP_OFF

and


Shader error in 'Hidden/Shader Forge/PresetPBR': 'gl_' : reserved built-in name at line 144 (on opengl)


Compiling Vertex program with DIRECTIONAL SHADOWS_OFF LIGHTMAP_OFF DIRLIGHTMAP_OFF DYNAMICLIGHTMAP_OFF