The easiest way to replicate the issue is:

• clone the NGO repository (develop branch)
• Add the com.unity.netcode.gameobjects\testproject to your Unity Hub
• Open test project using 2022.3.13f1 (or higher)
• Open Test Runner and set the build to "Build Selected Tests"
• Navigate down to the Unity.Netcode.Runtime.Tests.dll
• Select a small subset of tests

* i.e. NetworkSpawnManagerTests works
Hit the "Build Selected Tests" and target whatever folder you like

• Once the testrunner stand alone build has finished building run it

Then navigate to the Test Runner window opened and try to scroll or interact with it.