Export to PDF - Cannot read property 'className' of null

i am using scheduler exportToPdf(offline) for exporting my schedule and it works fine.
But
when i am click on ExportToPdf button on grid view mode (i am using Grid in Scheduler). it showing
ERROR (in Console) : Cannot read property ‘className’ of null

Hi,

I have the exactly same problem. I still trying to print to pdf. The documentation its not helpful enough.

Any updates on this ?

There must not be such a problem in the case of online export service.

docs.dhtmlx.com/scheduler/pdf.html