Editable columns are not working?

I have a data grid with 2 editable columns, ‘Invoiced Quantity’ and ‘Invoiced Amount’. When I try clicking on the cells of either column to edit the value, the console gives me the following error: “Finance.Overview_Invoices.grid2: An error occurred in listener of event 'onCellClicked': TypeError: Invalid argument” Currently to work around this issue im using a pop up action which allows me to edit the amount and quantity of each item but it will be much easier if I can get these editable columns to work.
1 answers

Do you use any widget with the datagrid? Also, what is the data source of the grid (database, xpath, microflow)?