How to solve the keyboard does not pop up on LG G3

If you use LG G3 and find that the keyboard does not pop up, you can solve it by following these steps

1. Go to app "Settings"

2. Go to tab "General"

3. Go to menu "Apps"

4. Go to tab "Running"

5. Choose "LG Keyboard"

6. Stop all the apps related to "LG Keyboard"