Thread:Extension talk:ParserFunctions/Don't know how to fix this error

Warning: Parameter 1 to ExtParserFunctions::ifObj expected to be a reference, value given in C:\xampp\htdocs\mediawiki\extensions\ParserFunctions\ParserFunctions.php on line 122

I recently migrated a dev wiki from one computer to the next, and any page using Parser Functions gets this error. I cannot find any information about how it is being caused, nor anything about how to fix it. After refreshing the browser cache, the error goes away, but only until I restart my copy of XAMPP. Any suggestions?