The main cause of the error could be the use of react-native.config.js file.
Check out the solution below even if you not using react-native.config.js.
Removing duplicate font files in
Copy Bundle Resources will resolve the issue.
The problem seems to be caused by the new auto-linking feature in React Native 0.60 - the line
ios/Podfile means when you do
pod install, any pods found in
node_modules are automatically linked. This means that links to all font files are added to
[CP] Copy Pods Resources when you do
If you previously installed
react-native-vector-icons manually by adding the font files to
Copy Bundle Resources(or using the config file mentioned above react-native.config.js), you then get a "Multiple commands produce..." fatal build error.
So to fix the problem, just remove the font files from
Copy Bundle Resources, so that they are only in
[CP] Copy Pods Resources.