I am not into modding, but I wanted to modifiy the pehkui mod, but when I tried to compile the mod, it gave me the following error:
error.txt
I kindly ask for help on what I need to do to compile this mod,

P.S how do I attach a label I dont use github very often

Building via Gradle should be a bit better as of the 3.8.0 release. Please do try it out again, making sure that you're running Gradle using Java 17.