vcf2treemix.sh plink2 version error

Hi, I would like to use vcf2treemix.sh file, but I got an error message "ERROR: treemix mc = line[6] indexerror: list index out of range"
so, I expect it to be a mismatch between plinks versions.
Could you suggest any ideas? I hoply can use vcf2treemix.sh under Plink2 version
Thank you:)