Udacity Star Notary project common mistakes

Why my dApp throws this error: “Error: StarNotary has not been deployed to detected network (network/artifact mismatch)”?

This happens because the ABI of the contract that you created does not have in the property networks the address of the contract and the id of the network where it was deployed.

https://ethereum.stackexchange.com/questions/19037/truffle-webpack-starts-with-error-metacoin-has-not-been-deployed-to-detected-ne