I'm clicking on the shortcut, but instead of the sign in. It shows an error saying, "Curse Client v4 could not be started, due to a corrupt or missing DLL. Please not that Curse Client v$ must be launched via it's shortcut in the Windows start menu or desktop.

The followeing error was reported:

could not load file or assembly 'sorttbls.nlp' or one of its dependencies.
The system cannot fin the file specified."

I haven't messed with anything recently, and it was working fine not to long ago.