onError does not catch bad URIs

Bug description: A misspecified URI throws an exception that onError does not catch. Instead, we get a red box error: Exception thrown while executing UI block: https:// is not a file URL (when using just https:// as the uri).

To Reproduce: import React, { Component } from ‘react’; import { WebView } from ‘react-native-webview’;

class App extends Component {
  render() {
    return (
      <WebView
        source={{ uri: 'https://' }}
        onError={syntheticEvent => {
          const { nativeEvent } = syntheticEvent;
          console.warn('WebView error: ', nativeEvent);
        }}
        style={{ marginTop: 20 }}
      />
    );
  }
}

export default App;

Expected behavior: I would expect there to be some way to catch this type of exception gracefully.

Environment:

• OS: iOS
• OS version: simulator
• react-native version: 0.61.4
• react-native-webview version: 8.0.3

[SamiChab]

Hello, still searching for solutions on this… I get an error in my logs backend.js:32 Error opening URL: Error: Unable to open URL [...] without having onError fired

[nullpointer010]

Same issue