Problem with webix 4.2.1 on ie8

I changed webix 4.1.0 to 4.2.1.
After the change, javascript error occurs in ie8.
Chrome and IE11 will not get an error.
The content of the error can not be set on line 430 of webix_debug.js “SCRIPT5007: attribute not defined or null reference ‘2’”.

Hello,

Could you please point to a sample / piece of code / Webix widget or functionality where the error can be spotted?

We have spotted the problem, thank you for reporting. The fix will be included into the next update.

If you have a support subscription and need the fix ASAP, please contact support@webix.com.