If you are using widget column (Ext.grid.column.Widget class) with content grid you will get error “Uncaught TypeError: Cannot read property ‘isModel’ of null” on clicking on the cell of the child grid.
If you are using widget column (Ext.grid.column.Widget class) with content grid you will get error “Uncaught TypeError: Cannot read property ‘isModel’ of null” on clicking on the cell of the child grid.