Try going into the options>General Properties> Default Browser, verify the browser is set to Internet Browser
Next, press the back key, Go to Browser Configuration, and verify the Browser Identification is set to BlackBerry. Alternatively try Internet Explorer. Now try to re-install Facebook.
Sorry to learn that you are getting this error. I've done some research and I found the answer for you on the Blackberry website. Here's the info on how to resolve this error message: http://is.gd/IsPbYk Please follow these steps and you should have no problem getting your Facebook application back.
Follow us on Twitter @VZWSupport