Reproduction steps:
1. Open the attached “WebGLTest600000b15.zip“ project
2. Ensure Web is the selected platform in the Build Settings
3. Build And Run (File > Build And Run)
4. Observe the Player in the browser

Expected result: The game is visible in the Player
Actual result: Only a black screen is visible in the Player

Reproducible with: 6000.0.0b14, 6000.0.0b15
Not reproducible with: 2021.3.37f1, 2022.3.25f1, 2023.2.19f1, 6000.0.0b13

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note:
- Downgrading may disable the “Target WebAssembly 2023” property. The property is located in the Player settings, under Publishing Settings