Subscription Fault for multiple users
One of our websites have had multiple users reporting a "Subscription Fault" error. Looking at the code this appears to be tied into the email notifications. We use WP Mail SMTP, and can see that there is a very high level of engagement on our comments, and we know that email deliverability is not an issue.
Neither myself or the support team have been able to reproduce this - can you advise what the issue may be? Or more importantly, how to resolve it?
Please leave an example URL to allow us to check the issue.
This is a member-only website. I have previously set up an account for you to access our staging site, let me know if you would like me to send this through again.