Unable to setup the repo locally

[Vaib215]

I cloned the repo locally & followed the instructions. After setting up the .dev.vars file, I got this issue on running it in browser:

✘ [ERROR] DOMException {

    code: 5,
    name: 'InvalidCharacterError',
    message: "atob() called with invalid base64-encoded data. (Only whitespace, '+', '/', alphanumeric ASCII, and up to two terminal '=' signs when the input data length is divisible by 4 are allowed.)",
    stack: "InvalidCharacterError: atob() called with invalid base64-encoded data. (Only whitespace, '+', '/', alphanumeric ASCII, and up to two terminal '=' signs when the input data length is divisible by 4 are allowed.)\n" +
      '    at unsign (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/cloudflare/dist/crypto.js:29:42)\n' +
      '    at async decodeCookieValue (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/server-runtime/dist/esm/cookies.js:88:27)\n' +
      '    at async Object.parse (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/server-runtime/dist/esm/cookies.js:60:60)\n' +
      '    at async getSession (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/server-runtime/dist/esm/sessions/cookieStorage.js:32:45)\n' +
      '    at async getUsername (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/app/utils/getUsername.server.ts:31:18)\n' +
      '    at async loader (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/app/root.tsx:36:20)\n' +
      '    at async callRouteLoader (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/server-runtime/dist/esm/data.js:62:16)\n' +
      '    at null.<anonymous> (async file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/.wrangler/tmp/dev-eqryWK/index.js:3128:19)\n' +
      '    at async callLoaderOrAction (file:///Users/vaib/Documents/codes/webdev/the-abc-live/orange/node_modules/@remix-run/router/router.ts:4832:16)\n' +
      '    at async Promise.all (index 0)'
  }

[wrangler:inf] GET / 500 Internal Server Error (36ms)

I want to play around with cloudflare calls. Is there a way to resolve this problem?