Build a Build Script: Syntax error: redirection unexpected

I’m on step 4 of the Build a Build Script tutorial and I’m getting this error message.

./script.sh: 5: ./script.sh: Syntax error: redirection unexpected

This is my script:

#!/bin/bash
echo "🔥🔥🔥Beginning build!! 🔥🔥🔥"
firstline=$(head -n 1 source/changelog.md)
read -a splitfirstline <<< $firstline
echo $splitfirstline

Perhaps the ‘<<<’ is generating issues?

I’ve seen the youtube video and it seems like I’m doing exactly what I’m told to do. What am I doing wrong?