Bug with exportToExcel when datatable cell's value is null

Webix JS
1

webix version: 2.1.12,
when datatable cell’s value is null(display null), exportToExcel can not work.
error message is :
Uncaught TypeError: Cannot read property ‘toString’ of null webix_debug.js line:18379.

2

I can confirm the issue.
Fix will be included in the next build.

3

thanks, webix 2.2.0 fixed this issue.