Is the DataGrid2 placed within a DataView to store personalized configuration? I've see this error often if the DataGrid2 widget can't read the configuration correctly (often when the configuration was created with an older version of the widget and then the project updates the widget). But then it wouldn't be browser specific but more user account specific...
Sometimes the Browser Console log can contain helpful information to get a better idea of the issue encountered.
Hi,
for me, deleting the cookies and refreshing the page solved the problem.