Keyboard does not open on android devices

So I recently uploaded my game to Google play, and a lot of users have reported that their touch keyboard does not open.

Code (CSharp):

1. public Text keyboardText; // Text that shows what we are typing
2.  
3.     TouchScreenKeyboard keyboard;
4.  
5.     public void StartSaveProcess()
6.     {
7.         // Resets keyboard text
8.         keyboardText.text = "";
9.  
10.         // Opens keyboard
11.         keyboard = TouchScreenKeyboard.Open( "", TouchScreenKeyboardType.Default);
12.  
13.        TouchScreenKeyboard.hideInput = true;
14.  
15.         keyboard.active = true;
16.     }

Surprisingly enough, it does work on iOS, but not on Android.