The 3 most common causes of that issue are:
1) Your Twitter Application wasn't set up properly
2) You didn't copy the API Key and Secret properly to JFBConnect
3) Your server time is incorrect
Please double check #1 & 2 and go through our
Twitter Application Setup guide
for Joomla again. If this doesn't fix the problem, we'll help you look into it further.
-Melissa
bad request token
