Question Error on build "ArgumentException: Scene file not found: ''."

I've been trying to build a webgl game. using the unity lego microgame package.

the games menu will work but when i click play to load the next scene i get an error stating:
"WebGL: RuntimeError: memory access out of bounds."

i noticed when i build the game i get the following error:
ArgumentException: Scene file not found: ''.
UnityEditor.SceneManagement.EditorSceneManager.OpenScene (System.String scenePath, UnityEditor.SceneManagement.OpenSceneMode mode) (at <8d21067e8d9c494db25a2b2485216e63>:0)
UnityEditor.SceneManagement.EditorSceneManager.OpenScene (System.String scenePath) (at <8d21067e8d9c494db25a2b2485216e63>:0)
LEGOModelImporter.ProcessHelper.ProcessAssets (System.Func`2[T,TResult] processAction) (at Library/PackageCache/com.unity.lego.modelimporter@3.2.0/Editor/ProcessBuild.cs:131)
LEGOModelImporter.PreProcessBuild.OnPreprocessBuild (UnityEditor.Build.Reporting.BuildReport report) (at Library/PackageCache/com.unity.lego.modelimporter@3.2.0/Editor/ProcessBuild.cs:32)
UnityEditor.Build.BuildPipelineInterfaces+<>c__DisplayClass15_0.<OnBuildPreProcess>b__1 (UnityEditor.Build.IPreprocessBuildWithReport bpp) (at <8d21067e8d9c494db25a2b2485216e63>:0)
UnityEditor.Build.BuildPipelineInterfaces.InvokeCallbackInterfacesPair[T1,T2] (System.Collections.Generic.List`1[T] oneInterfaces, System.Action`1[T] invocationOne, System.Collections.Generic.List`1[T] twoInterfaces, System.Action`1[T] invocationTwo, System.Boolean exitOnFailure) (at <8d21067e8d9c494db25a2b2485216e63>:0)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)



would anyone be able to advice what i may have done wrong ?

 

for anyone having this issue.

The fix was simple, the lego prebuilt mesh combiner seemed to be not working correctly.

i disabled the line :
meshCombiner.GridExtents = optimizationBounds.size;

in the BrickMeshCombiner script. found on the GameManger object.