Canvas elements are rendered pink when the project is built

Unity: uGUI Framework

6.4.X

6.3.X

6.0.X

6.2.X

Unity 6000.2 has reached its end of life and will not receive further updates. If you need additional fixes, please upgrade to a newer Unity version.

How to reproduce:
1. Open the 'unity 6.x parkour.zip' project
2. Build the project
3. Observe the result

Expected result: Canvas elements are rendered
Actual result: Canvas elements are not rendered

Reproducible with: 2023.3.0b10, 6000.0.62f1, 6000.2.11f1, 6000.3.0b9, 6000.4.0a4
Could not test with: 2023.2.22f1 (Unfixable console errors)

Reproducible on: macOS 26.0.1 (M1 Max)
Not reproducible on: no other environments tested