Why did you have to uninstall it?
If you have found a bug with it, this isn't the thread to report it.
it was the only addon installed specific to your quote...Do you have any other add-ons installed that do anything at all with Twitter, Facebook or Google?
I have the same problem and have checked the URL's and they match.That usually means that your board URL (as defined in Admin CP > Options > Basic Board Information) doesn't match the URLs you're instructed to enter here:
6. Select "Web application" and enter your URL into both callback fields and click "Create".