[URP][case 1348209] fix for gray thumbnails

com.unity.render-pipelines.universal/CHANGELOG.md

@@ -37,8 +37,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Added "Conservative Enclosing Sphere" setting to fix shadow frustum culling issue where shadows are erroneously culled in corners of cascades [case 1153151](https://issuetracker.unity3d.com/issues/lwrp-shadows-are-being-culled-incorrectly-in-the-corner-of-the-camera-viewport-when-the-far-clip-plane-is-small)
 - Fixed memory leak with XR combined occlusion meshes. [case 1366173]
 - Fixed a bug with Sprite Targets in ShaderGraph not rendering correctly in game view [1352225]
+- Fix for rendering thumbnails. [case 1348209](https://issuetracker.unity3d.com/issues/preview-of-assets-do-not-show-in-the-project-window)
 - Fixed a regression bug where XR camera postion can not be modified in beginCameraRendering [case 1365000]
 
+
 ## [12.0.0] - 2021-01-11
 ### Added
 - Added support for default sprite mask shaders for the 2D Renderer in URP.

com.unity.render-pipelines.universal/Runtime/UniversalRenderPipeline.cs

@@ -251,7 +251,7 @@ protected override void Render(ScriptableRenderContext renderContext, Camera[] c
             if (m_GlobalSettings == null || UniversalRenderPipelineGlobalSettings.instance == null)
             {
                 m_GlobalSettings = UniversalRenderPipelineGlobalSettings.Ensure();
-                return;
+                if(m_GlobalSettings == null) return;
             }
 #endif