[TYPO3] realurl configuration error

[Brian]

Hello all. I know that this question has been answered extensively but I cannot seem to get a correct solution to this problem. I have installed the RealURL extension and set up the typoscript, the localconf.php file, and the .htaccess file. 

But I am getting the "Reason: Segment 'about' was not a keyword for a postVarSet as expected!" error.