Chat bubble doesn't appear
Access your store URL, on the page you set to show the chat icon, press F12 or right click then select Inspect.
In the Console section, if you see the red line:
Refused to frame '
https://www.facebook.com/' because an ancestor violates the following Content Security Policy directive: "frame-ancestors https://www.facebook.com".
This mean that you haven’t whitelisted the domain on your Facebook page.
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Please follow our instructions here to configure our app with theme 2.0
If it's already on like this, please remind them to click on the button SAVE once again.
Connect to your Facebook Page is required to set up Messenger chat icon. Connect with Facebook in one click.
Please make sure that your page is visible to the public and everyone can message your page
Switch to your Page account and visit Settings
On the setting of the app, you choose the working hours and time-zone for the app, please test the app within the working hours so you can see it properly.