I have a wordpress site, which is using the WP Calandar booking plugin.

I have recently enabled the option to take payments.

When an email is sent to the customer, with a link to remind them to make payment online, they click it and it's blank. (this is a shortcode on thje wordpress page)

I have contacted WP calendar support, and they say:

Hello,

Sorry. I made a further tests and it seems like some other script (plugin or theme) insert the p tags into the JSON encoded code in your page.

Probably it's because of conflict with some other plugin or actual theme.

Please try to deactivate one by one all your active plugins at the WordPress Plugins menu and make testing after each plugin deactivation.

If it does not help, please deactivate all your plugins and activate the default WordPress theme. And then retest it again.

We just need to find the reason for this issue.

Please can someone help debug the issue?