getPopup() returns null (line 21) even after the Richselect is initialized and supposed to have a Popup window for drop-down list: http://webix.com/snippet/1cd267c6
I can confirm the issue.
As fast workaround - add “options:[]” to the “defaults” section. As result richselect will always have a list of options defined ( empty, but still defined ), which will ensure that popup and list in it will be created.
The popup does not error anymore. Thanks.