Same problem at line 3770 in version 3.9.20.
I have patched my local environment but the next time I sync with production it will be overwritten.
This is an easy change to the user-agent-vary.tpl file and has no impact to the plugin.
Is there a plan to fix this issue?
PHP Notice: register_rest_route was called incorrectly. The REST API route definition for if-menu/v1/did-you-made-this-request 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.)
