These are really questions you should be directing at Face Book support as it is there debugging page that is having the error, they will be able to help far more than I can.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.