When I load 1.12.2+quilt it crashes. Reproducible with only Global Data and Resource Packs and Quilt.

quilt 0.17.0-beta.2
qsl-1.1.0-beta.14_qfapi-1.0.0-beta.17_fapi-0.54.0_mc-1.18.2

https://gist.github.com/Trnrr/8141db75b5f1d990da7c6b3dc90a8d52

Fixed in version 1.12.2.1, thank you for reporting this ^^