While trying to complete che challenge, the following message appear:

Step not yet complete in [my personal developer edition]
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: IZYHXZTM.

Can someone help me?Thanks.

Build a Community with Knowledge and Chat Project 

I've completed all the steps in this module as stated and when I go to verify step I get this error message: Could not fine a Deployment with the Developer Name 'live_agent_setup_flow'. It does not say to create this flow anywhere in this module.

Anyone tell me what I am doing wrong?