Thread:Extension talk:LiquidThreads/How to uninstall LiquidThreads ?

Hi guys. I want to uninstall LiquidThreads from my wiki. When I tried to simply remove [require_once( "$IP/extensions/LiquidThreads/LiquidThreads.php" );] from my config file, my wiki shows white-screen only, no response.

How to uninstall this extensions safely? (wiki version is 1.21.3)