Cloud Flare and Rocket Script is known to cause some issues with WordPress plugins: http://snippets.webaware.com.au/snippets/stop-cloudflare-rocketscript-breaking-wordpress-plugin-scripts/.
Try disabling Cloud Flare for the sb-instagram.js and sb-instagram.min.js files to see if it corrects the issue.
Click on this link to download a modified .zip file plugin mentioned in this article that may prevent Instagram Feed’s js file from being included in rocketscript: https://cdn.smashballoon.com/wp-content/uploads/2017/07/16153053/sbi-no-rocketscript.zip?GoogleAccessId=smashballoon-offload-media-sa%40sb-backups-all.iam.gserviceaccount.com&Expires=1782284966&Signature=MIO%2F%2B8VGT%2F8%2FToNZSS0Z6C5uCm3InMG0qmjiGM9JnF0Y63SOD%2BR3%2BHNpQ1YR9h6FRFM5aStDITeMaX6PeyqpmJD9ygVkztn0IwsiZPzPczGef%2F3RRydqTGROGRTReP1bl7cEOY3AXX6%2BGOPsIl%2FJ9hm07cLerjUdP4O0qaQ%2BP4ooVNYm%2BUXjwOBxsbtKZuCUfoWahXbdACGjZxOWunlyIrnu7OLvwaAdcW4eJSinKQcGVc5gin4VzLqa48%2FFb6zAMb3jWmhBLLYOojTsdJkseA57M6pSNCa77yE5TqpAErsQmSPQJeu9MYBuY6Dt0VQT7Al%2BYyryB7gy9TDGAVUSxw%3D%3D