Analytics tracking ID (ex: UA-XXXXXXXXX-X) is displayed on the donation box

This is because you have entered the Google Analytics tracking ID instead of the full tracking code in the Analytics Tracking Codes field of the form editor. For instructions on how to obtain your full tracking code, please click the link: https://support.google.com/analytics/answer/1008080.

In the Tracking tab of your form editor, please insert your full Google Analytics tracking code (not just the ID) into the Analytics tracking codes field.

Update:

Due to Google chrome's strict cookie policy for cross-site requests, we need to instruct the tracking code to set cookie flags that is necessary for the tracking to work properly inside the embedded form (iframe)

Modify the line gtag('config', 'xxxxxxx'); in the code to look like below:

gtag('config', 'xxxxxxxx', {
  cookie_flags: 'secure;samesite=none',
});