I am trying to convert an firebase image URL to base64 using expo FileSystem but getting following error.

[Unhandled promise rejection: Error: Location "https://pngimg.com/uploads/birds/small/birds_PNG108.png" isn't readable - Expo React Native

URL is totally fine and perfect as I can open it in browser. I am trying following URL, and tried multiple other URLs as well.

https://pngimg.com/uploads/birds/small/birds_PNG108.png

Following is my code.

import * as FileSystem from 'expo-file-system';
<TouchableOpacity onPress={async () => {
      const base64 = await FileSystem.readAsStringAsync('https://pngimg.com/uploads/birds/small/birds_PNG108.png', { encoding: 'base64' });
        Share.share(
          {
            title: 'test title',
            url: item.url,
          },
          {
            excludedActivityTypes: [
              
            ],
          }
        );
     }}>
    </TouchableOpacity>
    
  )}

Couldn't find any solution to this problem on any forum.