Plugin Issue After I Update WordPress 5.5

I got the below message, could anyone help me with this,
register_rest_route was called incorrectly. The REST API route definition for post-views-counter/view-post 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 /var/www/projectnotes.org/wp-includes/functions.php on line 5225