REST API – PHP Error log

I have rolled back to 4.2. I’m seeing this in my PHP Error log. Does this indicate anything helpful?

Notice: register_rest_route was called incorrectly. The REST API route definition for instant-images/test is missing the required permission_callback argument. For REST API routes that are intended to be public, use __return_true as the permission callback. Please see Debugging in WordPress for more information. (This message was added in version 5.5.0.) in /home/redacted/public_html/mayur.ca/wp-includes/functions.php on line 5229