Updated v1.3 commit has fatal error when tried to build 

I tried to build code version from this commit: https://github.com/rocket-pool/treegen/tree/87cdebaffe373174a060b89fdbee7755e059137c
But have next error: 
<img width="941" alt="image" src="https://github.com/rocket-pool/treegen/assets/61886955/54646248-9cae-476d-942a-8c5382683cc0">
I have mac m1, but i tried to build it on ubuntu amd64 too and have same error