1. If you can open LDPlayer before, you should remove this LDPlayer in LDMultiPlayer (note that your previous data in that LDPlayer will be deleted). The reason for that is as follows. Your emulator is corrupted, which is caused by the abnormal shutdown of your computer.
How to use LDMultiPlayer
2. If it occurs when you open LDPlayer for the first time, there should be something wrong with your graphics driver. All you have to do is to update your graphics driver.
How to update the graphics card's driver
3. If the above methods do not work, uninstall your anti-virus software (Avast, 360, Kingsoft, etc.) and then restart the computer and then reinstall LDPlayer.