How to reproduce:
1. Open the user's attached "addressablebug-lightingdata.zip" project
2. Go to Window -> Asset Management -> Addressables -> Groups
3. Go to Build -> New Build -> Default Build Script in the Addressables Groups window
4. Observe the Console log

Expected result: No error messages are printed in the Console log
Actual result: "Index was out of range. Must be non-negative and less than the size of the collection." error message is printed in the Console log

Reproducible with: 2020.2.0a9 (1.10.0), 2020.2.2f1 (1.16.15), 2021.1.0b2 (1.16.15), 2021.2.0a1 (1.16.15)
Not reproducible with: 2018.4.30f1 (1.16.15), 2019.4.18f1 (1.16.15), 2020.1.17f1 (1.16.15), 2020.2.0a9 (1.9.2)