maru
2
In my experience, for large JSON strings the API connector easily times out. Looking at the call data you shared, it seems to be quite big, possibly too big. Check your app’s usage analytics under Logs -> Capacity and see if the app timed out when you initialised the call.
You could solve this adding more capacity to your app. Alternatively you could go with an external processor like Integromat. This worked well for me before, but adds more cost to your setup.