I have been continuously getting the error below. I have a Mac and have been trying to create a react native app with React CLI, but I have been continuously running into errors. My app is building but then when I open it I get the following error. I am not sure what to do because my Metro is running from the right folder. All the other solutions I found online are not working for me or they are outdated and are not in my code.
image of error
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I've been given a new React Native app to maintain and whenever I build it or run it in the simulator, I get the "Application has not been registered" error. There are no other errors in the console before this message (although there are some warnings). I can't find any code issues as if the error message is dismissed in the simulator, the app runs fine so the bundler is running correctly, although on an actual device, this registers as a crash on open.
I'm running in the simulator using react-native run-ios from the project root. Builds for running on actual devices is managed by Fastlane.
My app doesn't make an explicit call AppRegistry.registerComponent due (I think) to the way react-native-navigation is set up, so most of the info online about this error doesn't apply.
Where should I go next to figure this out?
I installed React Native following the requirements in the documentation (https://reactnative.dev/docs/environment-setup) , i got all the simulators working but i have to manually open them everytime i open the project.
If i press m after npm start the following error shows "warn No apps connected. Sending "devMenu" to all React Native apps failed."
(Btw this is my first time using React-Native so sorry if this is a rookie mistake)
Does anyone know any solution ?
So I'm new to React Native Expo and am trying to build a social app. Trying to test my app on my iPhone, I used my camera to scan the QR code provided by the Metro Bundler and tried to open my app on Expo Go. So I have different screens and a js file for each of the screens, and the bundler returns an error says the source code for the screens doesn't exist. It worked fine on a web browser on my computer. Any idea how to solve this? This might be a stupid question. Thanks a lot.
Here is a screenshot of the error:
error image
I have not made any changes to the code until now. I am just trying to run the project on my mobile but it is throwing this error.
I've been trying out React Native lately and I got everything setup right.
Im running my Android Virtual Device and my RN app is displaying and reloading just fine.
However, every after a certain amount of time, when i hit RR (refresh) i get this error:
The only way I can seem to recover from this is if I rerun React native command:
react-native run-android
After that, it's ok again..... until after a few minutes, I get that dreaded RED SCREEN OF DEATH again.
What could be causing this? Timeout of some sort?
TIA
There are some reasons for that.
You have problem on JS files you are using (you can see errors on
react packager)
You are closing the react packager terminal after run your app
It closes itself automatically with some terminal reasons
Do you get any error on react packager?