Ive followed every step in Alejo’s YT videos for VAPI squad, every time i call the answering machine tells me “could not get assistant”. Ive also tried using only json, i get the same result. What could it possibly be that im doing wrong?

Hello All! I've finally managed to create an outbound call for my leads, although i have 2 issues i need help with: 1) How can i optimise my scenario to call my leads at the scheduled time they have booked in? 2) How can i extract the end of call report (see what was spoken in that convo)? I've attached my scenario i am currently using.

My webhook is not receiving my end of call reports & transcript. When checking the call log, i get a list of “transcript Server URL Error: Request failed with status code 400”. I tested my webhook URL on postmaster, it gets “accepted”- I've also used the VAPI 'watch end of call report' webhook, its the same issue... Why am i getting this issue, can anyone help?