'NullReferenceException' is thrown on UI.Image.GenerateTiledSprite when Image Type is set to Tiled

Unity: uGUI

2023.1.X

2022.2.X

2022.1.X

2021.3.X

2020.3.X

Fixed in 2023.1.0a5

Fixed in: 2022.2.0b10

Fixed in: 2022.1.20f1

Backport original fix. Summary, it fixes the NullReferenceException on Tiled image types when the sprite atlas being used is omitted from the build.

Fixed in: 2020.3.41f1

Reproduction steps:

1. Open the attached 'Test_01' project
2. Open the 'SampleScene'
3. Enter Play mode
4. Observe the Console

Expected result: No errors are in the Console
Actual result: 'NullReferenceException: Object reference not set to an instance of an object' is thrown

Reproducible with: 2019.4.39f1, 2020.3.34f1, 2021.3.4f1, 2022.1.4f1, 2022.2.0a16

Reproduced on: macOS 11.6 (Intel)