Macbook Air freezes when changing screensaver

I am having issues when I try to change my screensaver. Whenever I click on a different screensaver option, my Macbook Air freezes, and I have to force close System Preferences. I have no problems with changing my desktop wallpaper. I have restarted my laptop but it still freezes.
I saw another board with a similiar problem except instead of the screensaver window freezing, their desktop window would freeze.
Any ideas? Thanks in advance for any suggestions!

Back up all data. Quit System Preferences if it's running.
Triple-click anywhere in the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:
~/Library/Preferences/ByHost
In the Finder, select
Go ▹ Go to Folder...
from the menu bar. Paste into the box that opens (command-V), then press return. A folder should open. If it does, look for a file with a long name that begins "com.apple.screensaver". There may be several such files. Move them to the Trash.
Test. If the problem is resolved. recreate your settings in the Screen Saver tab.

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