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(node:21793) UnhandledPromiseRejectionWarning: Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app
See https://fb.me/react-invalid-hook-call for tips about how to debug and fix this problem.
    at resolveDispatcher (webpack://%5Bname%5D/./node_modules/react/cjs/react.development.js?:1465:13)
    at useState (webpack://%5Bname%5D/./node_modules/react/cjs/react.development.js?:1496:20)
    at Header (webpack://__FIREJS_APP__/./src/pages/404.js?:22:73)
    at processChild (/media/dedsec/Data/Projects/FireJS/node_modules/react-dom/cjs/react-dom-server.node.development.js:3043:14)
    at resolve (/media/dedsec/Data/Projects/FireJS/node_modules/react-dom/cjs/react-dom-server.node.development.js:2960:5)
    at ReactDOMServerRenderer.render (/media/dedsec/Data/Projects/FireJS/node_modules/react-dom/cjs/react-dom-server.node.development.js:3435:22)
    at ReactDOMServerRenderer.read (/media/dedsec/Data/Projects/FireJS/node_modules/react-dom/cjs/react-dom-server.node.development.js:3373:29)
    at Object.renderToString (/media/dedsec/Data/Projects/FireJS/node_modules/react-dom/cjs/react-dom-server.node.development.js:3988:27)
    at /media/dedsec/Data/Projects/FireJS/dist/architects/StaticArchitect.js:51:36
    at default_1.render (/media/dedsec/Data/Projects/FireJS/dist/architects/StaticArchitect.js:57:11)
    at /media/dedsec/Data/Projects/FireJS/dist/FireJS.js:99:143
    at default_1.<anonymous> (/media/dedsec/Data/Projects/FireJS/dist/classes/Plugin.js:20:13)
    at Generator.next (<anonymous>)
    at /media/dedsec/Data/Projects/FireJS/dist/classes/Plugin.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/media/dedsec/Data/Projects/FireJS/dist/classes/Plugin.js:4:12)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:21793) 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(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:21793) [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.

import React, {useState} from 'react';

export default () => {
    // Declare a new state variable, which we'll call "count"
    const [count, setCount] = useState(0);

    return (
        <div>
            <p>You clicked {count} times</p>
            <button onClick={() => setCount(count + 1)}>
                Click me
            </button>
        </div>
    );
}