Tracking widget or shortcode

Great plugin, thank you.

I can’t seem to get the tracking link working. If I add the shortcode to a page I get “Updating failed. Error message: The response is not a valid JSON response.” . Adding the widget displays the form, but nothing happens when submitting a valid tracking code (nothing seems to be posted on the network).

Might not be relevant but google recaptcha is active on the page.

Ideally, I would like the text “…shipped via Sendle on February 13, 2020 with tracking number …” to be linked to the tracking page.

May be relevant – I have shipstation installed, which sends an email with a tracking link (track.sendle.com…), this all works fine. Would just like to be able to link to that from the orders page.