On Selecting Sprite Light Type under Light 2D Component in the Inspector causes the editor to throw UnassignedReferenceException, Refer to the attached video.

Steps to repro:
1. Create a new Project with URP Template
2. Project > Create > Rendering > Universal Render Pipeline > 2D Renderer
3. Assign 2D Renderer in the URP Asset
4. Hierarchy > Create > Light > Global Light 2D
5. Inspector > Light 2D > Light Type > Sprite

Actual Result:
UnassignedReferenceException is thrown on selecting Sprite Light Type under Light 2D Component in the Inspector

Expected Result:
Sprite Light Type is selected gracefully

Reproducible on:
2021.2.0a2, 2021.1.0b3, 2021.1.0a10 with pacakge version 11.0.0

Working fine on:
2021.1.0a9, 2020.2.2f1 with package version 10.2.2

Environment:
Windows 10, macOS 10.15

Stack trace:
UnassignedReferenceException: The variable m_LightCookieSprite of Light2D has not been assigned.
You probably need to assign the m_LightCookieSprite variable of the Light2D script in the inspector.
UnityEngine.Experimental.Rendering.Universal.LightUtility.GenerateSpriteMesh (UnityEngine.Experimental.Rendering.Universal.Light2D light, UnityEngine.Sprite sprite) (at Library/PackageCache/com.unity.render-pipelines.universal@11.0.0/Runtime/2D/LightUtility.cs:446)
UnityEngine.Experimental.Rendering.Universal.Light2D.UpdateMesh (System.Boolean forceUpdate) (at Library/PackageCache/com.unity.render-pipelines.universal@11.0.0/Runtime/2D/Light2D.cs:250)
UnityEditor.Experimental.Rendering.Universal.Light2DEditor.OnInspectorGUI () (at Library/PackageCache/com.unity.render-pipelines.universal@11.0.0/Editor/2D/Light2DEditor.cs:820)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <37a04eb03f2448cf8503c9b487945f53>:0)
UnityEditor.PopupCallbackInfo:SetEnumValueDelegate(Object, String[], Int32)