Pabbly Connect waits for 25 seconds to receive a response from any application. The issue you are describing occurs when an application takes more than 25 seconds to process a request, and because of this, Pabbly Connect does not receive the response within 25 seconds, leading to the error you encountered.
In your case, it seems the application you are trying to post to takes more than 25 seconds to process the request and return a response to Pabbly Connect. I’m afraid there is no workaround for this at the moment. The application you are trying to send the custom POST request to needs to return a response within 25 seconds.
The maximum allowed timeout in Pabbly is 25 seconds. Right now the 25 seconds is the soft limit that we output in the message. If the response does not arrive in overall 25 seconds then we close the connection for that action step and output the response not received in 15 seconds message...
forum.pabbly.com