There is very little information returned from API so we can debug it on our end.
Anything you can help us with? We haven't updated the notification service (using Novu) for several months so definitely something has changed on the Novu side but can't identify what exactly.
In terms of rate-limiting, we've only sent 23 messages today and we are way below our free tier's plan limit... not using even 1% of the capacity.