We have used contact_sync API V1 with cURL PHP and used the sample code provided here: API Examples Using contact_sync and it is working fine.
But sometimes without any reason, it gives error “Nothing was returned. Do you have a connection to Email Marketing server?”
For testing, I added a logger to save the request data and params if any request fails that way, so I got one request data today that failed and tried it manually and it worked fine, so there was no reason that it should give the above error.
Can someone explain to me why this contact_sync api works sometimes and sometimes give such error??
Does the active campaign servers get down or broken sometimes and we get such error??