I upgraded to the newest version of Visual Composer, and now all text box inputs are just white screens.
I tried reinstalling both the plugin and the theme, it’s still a white screen.
The newest version 4.11.2 of visual composer is compatible with WordPress 4.5 and may be not compatible with older version. Wait for them to fix the bug.
My WP is running 4.5 though, and my theme is compaitable with 4.5