How to fix React Native version mismatch

To fix this just do the following

1). Open package.json

2). Change this line

"react-native": "^0.61.4",

to reflect the new version.

For example if it says Javascript version is 20 and React Version is 19, your line would become

"react-native": "20",

3). Save the file
4). Close your eyes, delete the node_modules folder
5). Open your eyes and type

If you use Yarn:

yarn install

if you use NPM:

npm install

6). Start the app by typing

yarn start -c

or

npm start -c

or

expo start