In the DataGrid, ie browser error: SCRIPT5007: Unable to get the value of the property "RowSpan": object is null or undefined

When the project is always using Datagird, the resulting interface, such as a function button on the original title, disappears at this time

Error: SCRIPT5007: Could not get the value of the property "RowSpan": the object is null or undefined,

The cause of this error is roughly the following: (1) may be under the DataGrid frozencolumns:[[{...}]   Or columns:[[{...},{...}]] {...} One more comma (,)

The reason for the lookup is: columns the definition of a place where you write a comma, double-check.

The actual effect is:

Myth: It is not a cross-line of "operation" that is said on the Internet, be sure to take field: ' Opt ',

In the DataGrid, ie browser error: SCRIPT5007: Unable to get the value of the property "RowSpan": object is null or undefined