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=1778944021&Signature=DkpL3bqP0ZOkC0yWuXYLf5%2FP4Wgo6n07MJcmFf0TQLQpHYgP93mL2qoJUv6sc9XbjbBwq0YgQ0qa6Y32aEhOExSh6tnWF%2BGaRwhb2B4WUng91jJAz6bOrCMRa4Zqcp4c4TnJi8h2bh2sg9PI%2FLOBYZf8qH76KOWBvdcWs3ooP%2BLQxJy4%2FgeH%2FVH0H5GpU9HEY%2B%2F8%2FPZj4xciWmRY7QofHueiF%2BhkqRHVnonlKiXNup%2BMVrC%2Ftt9l1C5T2k8A4z9JfWeMnzZUZMhRhKyuP2e0LUv2TIRb%2Fc44meJv%2BukU%2FpMzuuYbjZTgGig3tLiU3JZxtq70uQCacAMeOWw3BO1W%2FA%3D%3D
