Thread:Extension talk:WYSIWYG/CKeditor.body.php on line 221 Fatal error: Call to undefined method MediaWiki::getVal()/reply

I have not tested but it may be that your combination of MW 1.22.4 and wysiwyg-1.6.0_0 ( = "#x.1" of Extension:WYSIWYG section) may not be compatible at all. Perhaps you could try #6 bundle instead. It is not 100% error free but it works in my small internal wiki pretty well.