Shader failed to compile with no reason

Hey, I wasn’t sure which board to post this in but feel free to move it mods if there is a better board that fits.

So we recently moved to 4.18.3 using the github source, when packaging a bunch of materials fail to compile but it doesn’t tell us why it failed and the material editor looks just fine and shows no issues.

we get this in the log for each material that fails:

UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogShaderCompilers: Warning: X:\FF-Git\Content\FF_GARAGE\Meshes\materials\lambert2.uasset: Failed to compile Material for platform GLSL_150, Default Material will be used in game.

How can I find out why some materials are failing to compile? This is all the output log is giving me and the material editor doesn’t show any problems