glGetError() is useless unfortunately for getting any information about what went wrong, because it only has 8 error codes: https://registry.khronos.org/OpenGL

glGetError() is useless unfortunately for getting any information about what went wrong, because it only has 8 error codes: https://registry.khronos.org/OpenGL-Refpages/gl4/html/glGetError.xhtml https://registry.khronos.org/OpenGL-Refpages/gl4/html/glGetE... There's a debug output extension (or core feature since 4.3) that's slightly more verbose, but not universally supported (e.g. AFAIK not on macOS).