After compiling the smart contracts successfully when I open the client folder and do npm start the app fails to run.

Suggestion from @levackt:
Some errors are not shown to the user.
Choose the 10th account to reproduce

After installing discovery and discovery start,
(node:6639) UnhandledPromiseRejectionWarning: #
(node:6639) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:6639) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
I am getting this error.

Anyone know's how to debug this?

Hello, I followed your instruction but the front-end demo encountered an error as below:

Unhandled Rejection (Error): Given action "ENIGMA_INITIALIZED", reducer "enigma" returned undefined. To ignore an action, you must explicitly return the previous state. If you want this reducer to hold no value, you can return null instead of undefined.
▶ 3 stack frames were collapsed.
App._callee$
src/components/App.js:38
35 | // Initialize enigma-js client library (including web3)
36 | const enigma = await getEnigmaInit();
37 | // Create redux action to initialize set state variable containing enigma-js client library

38 | this.props.initializeEnigma(enigma);
| ^ 39 | // Initialize unlocked accounts
40 | const accounts = await enigma.web3.eth.getAccounts();
41 | // Create redux action to initialize set state variable containing unlocked accounts
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▶ 5 stack frames were collapsed.
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Does anyone know how to solve it?

By the way, is the front-end port number 3000?

I meet this problem.can you help me to solve this question?thanks

Suggestion from @levackt:
Perhaps explain the account being used, a new user may assume it's always their metamask account submitting transactions as a sort of admin adding all the millionaires, when the dropdown is switching the tx sender.