Reproduction steps:
1. Open the “VolumeManagerError.zip” Project
2. Open the “VolumeManagerError” Scene
3. In the Hierarchy window, select the “SeasonManager” GameObject
4. In the Inspector window, click on the “Summer” button under the “SeasonManager” script
5. Enter Play Mode
6. Observe the Console window and the Game view

Expected results: No errors are logged and the “Summer” effect is enabled
Actual results: Multiple errors are logged and both the “Spring” and “Summer” effects are enabled

Reproducible with: 2021.3.36f1, 2022.3.24f1, 2023.2.18f1, 6000.0.0b14

Reproducible on: Windows 10 (by reporter), Windows 11
Not reproducible on: No other environment tested

Workaround: in the {{LightingDebug.cs}} script uncomment lines 17 and 20. (Make the “Forcing Spring” code not run when entering Play Mode)