REST API Error message

Hi,

I am getting the following error on my page. Latest wordpress and plugin versions, running on Linux.

Notice: register_rest_route was called incorrectly. The REST API route definition for wpstatistics/v1/connection 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 ......./public_html/wp-includes/functions.php on line 5225