Smart Contract Deployment: parsePeerConnectionParameters:16: bad substitution

When following the steps on the Smart Contract Deployment chapter, when I run: source ./scripts/setPeerConnectionParam.sh 1 2

I get this error:
errorln () {
println "${C_RED}${1}${C_RESET}"
}
successln () {
println "${C_GREEN}${1}${C_RESET}"
}
infoln () {
println "${C_BLUE}${1}${C_RESET}"
}
warnln () {
println "${C_YELLOW}${1}${C_RESET}"
}
Using organization 1
parsePeerConnectionParameters:16: bad substitution