short term fix for editor/game mode/launcher tick times consistency (#1720)

Signed-off-by: amzn-sean <75276488+amzn-sean@users.noreply.github.com>

Gems/Atom/Feature/Common/Code/Source/Mesh/MeshFeatureProcessor.cpp

@@ -8,6 +8,7 @@
 #include <RenderCommon.h>
 
 #include <Atom/RHI/CpuProfiler.h>
+#include <Atom/RHI/RHIUtils.h>
 #include <Atom/RHI.Reflect/InputStreamLayoutBuilder.h>
 #include <Atom/Feature/Mesh/MeshFeatureProcessor.h>
 #include <Atom/Feature/ReflectionProbe/ReflectionProbeFeatureProcessor.h>
@@ -526,7 +527,10 @@ namespace AZ
             }
             else
             {
-                AZ_Error("MeshDataInstance::OnAssetReady", false, "Failed to create model instance for '%s'", asset.GetHint().c_str());
+                //when running with null renderer, the RPI::Model::FindOrCreate(...) is expected to return nullptr, so suppress this error.
+                AZ_Error(
+                    "MeshDataInstance::OnAssetReady", RHI::IsNullRenderer(), "Failed to create model instance for '%s'",
+                    asset.GetHint().c_str());
             }
         }