How to reproduce:
1. Create a new 2D or 3D project
2. Open the Multiplayer Center Tab (Window > Multiplayer > Multiplayer Center) and dock it with the Scene view
3. Click any option under ‘Genre of your Game’
4. Observe the result in the Console window

Expected result: No errors appear in the Console window
Actual result: “ArgumentException: Cannot unschedule unknown scheduled function”

Reproducible with: 6000.0.42f1, 6000.0.48f1, 6000.1.2f1, 6000.2.0a10
Not reproducible with: 6000.0.41f1

Reproduced on: Windows 11, macOS12 (M1)
Not reproduced on: No other environment tested

Notes:
- Restarting the project seems to fix the issue
- If the issue stops reproducing, delete the Mutliplayer Center package and reinstall it