Expo start gives a error

[jsiddharth]

22:50
Error: Cannot resolve entry file: The main field defined in your package.json points to a non-existent path.
at getEntryPointWithExtensions (/usr/lib/node_modules/expo-cli/node_modules/@expo/config/src/paths/paths.ts:73:17)
at Object.getEntryPoint (/usr/lib/node_modules/expo-cli/node_modules/@expo/config/src/paths/paths.ts:32:10)
at Object.resolveEntryPoint (/usr/lib/node_modules/expo-cli/node_modules/xdl/src/tools/resolveEntryPoint.ts:21:17)
at getManifestResponseAsync (/usr/lib/node_modules/expo-cli/node_modules/xdl/src/start/ManifestHandler.ts:198:22)
at getManifestResponseFromHeadersAsync (/usr/lib/node_modules/expo-cli/node_modules/xdl/src/start/ManifestHandler.ts:177:10)
at /usr/lib/node_modules/expo-cli/node_modules/xdl/src/start/ManifestHandler.ts:137:55
at call (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:239:7)
at next (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:183:5)
at /home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:803:9
at Generator.next ()
at asyncGeneratorStep (/home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:99:24)
at _next (/home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:119:9)
at /home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:124:7
at new Promise ()
at /home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:116:12
at Server._processRequest (/home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:805:7)
at /home/yogesh/mCruiseOn/badass/react-native-material-kit/node_modules/metro/src/Server.js:209:12
at call (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:239:7)
at next (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:183:5)
at next (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:161:14)
at jsonParser (/usr/lib/node_modules/expo-cli/node_modules/@expo/dev-server/node_modules/body-parser/lib/types/json.js:110:7)
at call (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:239:7)
at next (/usr/lib/node_modules/expo-cli/node_modules/connect/index.js:183:5)
at SendStream.error (/usr/lib/node_modules/expo-cli/node_modules/serve-static/index.js:121:7)
at SendStream.emit (node:events:365:28)
at SendStream.emit (node:domain:470:12)
at SendStream.error (/usr/lib/node_modules/expo-cli/node_modules/send/index.js:270:17)
at SendStream.onStatError (/usr/lib/node_modules/expo-cli/node_modules/send/index.js:421:12)
at next (/usr/lib/node_modules/expo-cli/node_modules/send/index.js:764:28)
at /usr/lib/node_modules/expo-cli/node_modules/send/index.js:772:23
at FSReqCallback.oncomplete (node:fs:194:21)

[jsiddharth]

package.json has
{
"name": "react-native-material-kit",
"version": "0.6.0-beta.2",
"description": "Bringing Material Design to React Native",
"main": "lib/index.js",
"typings": "lib/react-native-material-kit.d.ts",
"author": "Yingxin Wu yingxinwu.g@gmail.com",
"contributors": [
"Quentin Valmori (https://github.com/Crash--)",
"Alexander Price (https://github.com/alexprice91)"
],

There is no lib folder in the project