Connecting voiceflow to manychat with make, response is null

[Steven_Z]

Hi all,

I’m working on a scenario where a webhook receives an incoming Instagram DM (through ManyChat), sends the message to Voiceflow via HTTP POST, and then returns the response back to the user. Everything works up until the very last step.

So in the logs I see that Voiceflow gave me a perfect response like:

"Hello! We're absolutely delighted to hear from you..."

I don’t get any errors in make, but I get an error in manychat with repsonse is null or dynamic block error. In the last webhook in make I see the perfect answer from voiceflow, but the output bundle is empty. At first I thought it had to do with the fact that manychat needs response within 10 seconds and it takes longer for the scenario to finish, because voiceflow takes some time to respond. But I’ve tried a router at the beginning of the flow followed with a quick webhook response, but it didn’t make any difference. Could someone help me out, I have the feeling that I’m overlooking something…

[samliew]

Welcome to the Make community!

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[Steven_Z]

Hi Samliew, thanks for your very clear and fast response, appreciate it..

So to be absolutely clear about a few things:

• I test it out by sending a dm in instagram. I get a run in manychat and in make.com.
• My voiceflow agent works really good, but to make sure the problem wasn’t in there I created a really simple voiceflow scenario with only a text message and a capture and it still doesn’t work. So I think it hasn’t something to do with my VF agent being not compatible with manychat.
• I don’t get errors in make.com
• I get errors in my manychat log. It’s or ‘‘dynamic block - error completing request’’ or ‘‘external request processing events - response is null’’
• The scenario in make does take less than 40 seconds to complete
• every output bundle is fine. in ‘18 set variable’ the output bundle is still what I want, only the last one ‘19 webhook response’ give the following output bundle: [
  nul
  ]. You can see in the image I attached in the first post that its input is actually fine. So I don’t get it.
• I attached a blueprint and some screens to make it more clear
  Voiceflowmanychat.json (34.8 KB)