Siril 1.2.0-rc1shutdown in background extraction

hello all
Downloaded the 1.2.0-rc1 version
In this version the app closes as soon as I “Right click” (two finger) the little blocks in “background extraction” it only happens in this version as I downloaded the previous beta version again and everything works like normal.
MBP 2015 OS 10.15.7
I can’t send a report as Siril closes as soon as I try to remove one of the blocks, however if anybody needs/ wants more info let me know