Twilio error 11200

I created a simple bot to post twilio sms messages to slack, the bot posts just like it supposed to. but… if i go to my twilio console there is an error message for each sent sms, the error is 11200, http timeout, but the message does send

is there something i’m doing wrong with my setup.??

project is few-group.
im sending twilio. to

You’re sending a response back to Twilio, which looks fine. But they have a list of steps to try and rule things out here: