Getting blynk to work via usb serial

I’ve been trying for hrs and I still get “Sudo: ./blynk-ser.sh: command not found” no matter what I do. I’ve installed brew and done all the steps. I followed some troubleshoot steps after reading simular topics and now I get the response below. Please help…

Filthy@Roys-MBP-3 scripts % ./blynk-ser.sh
./blynk-ser.sh: line 24: This: command not found
./blynk-ser.sh: line 26: You: command not found
./blynk-ser.sh: line 27: syntax error near unexpected token newline' ./blynk-ser.sh: line 27: blynk-ser.sh -c -b -s -p ’
Filthy@Roys-MBP-3 scripts %