How to reproduce:
1. Create project with Sample "Cinematic Studio" (for example)
2. Run and Build the project
3. Observe Console

Actual result: "Unable to find player assembly" Warning appears
Expected result: Player is built without Warnings

Reproducible with: 2021.3.14f1, 2022.1.23f1
Couldn't test with: 2020.3.42f1, 2022.2.0b16, 2023.1.0a20 (No Sample)

Tested on: Windows 11

Warning message: "Unable to find player assembly: C:\t\My project (2737)\Temp\StagingArea\Data\Managed\UnityEngine.TestRunner.dll
UnityEngine.Debug:LogWarning (object)
Unity.Burst.Editor.BurstAotCompiler:OnPostBuildPlayerScriptDLLsImpl (UnityEditor.Build.Reporting.BuildReport) (at Library/PackageCache/com.unity.burst@1.6.6/Editor/BurstAotCompiler.cs:350)
Unity.Burst.Editor.BurstAotCompiler:OnPostBuildPlayerScriptDLLs (UnityEditor.Build.Reporting.BuildReport) (at Library/PackageCache/com.unity.burst@1.6.6/Editor/BurstAotCompiler.cs:208)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)"