Have you upgraded your code as per the upgrade guide
https://paramquery.com/pro/upgradeand there is an example on cell selections, on which click on row numbers work fine without error.
https://paramquery.com/pro/demos/selection_cellPlease use jQueryUI version 1.11.4. Which version of jQuery you have been using?
If there is still an error, could you please use pqgrid.dev.js instead of pqgrid.min.js to capture the error stack trace. That would be more helpful to find out the issue.