jQuery error in CGridView

I’ve added the CGridView in one of my views as many times before, but this time the ajax functionality was gone. Took a closer look and found that each time it tries to make a ajax request I get the following error: “Result of expression ‘$.param.querystring’ [undefined] is not a function” which indicates that the querystring function is missing.

Recently changes the root folders name of my web application so I deleted all generated assets in order to make it happend again but with no results.

A renderPartial with the fourth parameter sat to true (processOutput) caused the problem.