Bug [SOLVED] "Material not created" error on game build

I've created a build of a game with "Development Build" checked on and during gameplay the log keep spamming a "Material not created." log message.


Clicking on "Open log file" opens the log text file and I searched for this error message. Here's what it says:

Code (CSharp):

1. Material not created.
2. UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
3. UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
4. UnityEngine.Logger:Log(LogType, Object)
5. UnityEngine.Debug:LogError(Object)
6. LowResPass:Execute(ScriptableRenderContext, RenderingData&)
7. UnityEngine.Rendering.Universal.ScriptableRenderer:ExecuteRenderPass(ScriptableRenderContext, ScriptableRenderPass, RenderingData&)
8. UnityEngine.Rendering.Universal.ScriptableRenderer:ExecuteBlock(Int32, RenderBlocks&, ScriptableRenderContext, RenderingData&, Boolean)
9. UnityEngine.Rendering.Universal.ScriptableRenderer:Execute(ScriptableRenderContext, RenderingData&)
10. UnityEngine.Rendering.Universal.UniversalRenderPipeline:RenderSingleCamera(ScriptableRenderContext, CameraData, Boolean)
11. UnityEngine.Rendering.Universal.UniversalRenderPipeline:RenderCameraStack(ScriptableRenderContext, Camera)
12. UnityEngine.Rendering.Universal.UniversalRenderPipeline:Render(ScriptableRenderContext, List`1)
13. UnityEngine.Rendering.RenderPipeline:InternalRender(ScriptableRenderContext, List`1)
14. UnityEngine.Rendering.RenderPipelineManager:DoRenderLoop_Internal(RenderPipelineAsset, IntPtr, List`1)

What could be the problem?
I've attached the whole log files as well.

Using Unity 2021.3.7f1, URP 12.1.7

 

First thing I would try is a reimport all, then retry the build.

 

I tried that approach, the issue still persist. When playing the game, there isn't any pink material popping up and visually everything looks fine, it's just the logging that is printing this weird message.

 

Apparently it was a problem with an outdated shader using post-processing v3.