Bug report

Reproduction of the problem

1. Go to the Themebuilder page
2. Select BlueOpal theme
3. Modify the "Error" color.
4. Download the custom theme

Current behavior

The generated kendo.custom.css file contains the following rule:

undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined .k-text-error {
  color: #7030a0;
}

Expected/desired behavior

The rule should have correct selector, or if it is redundant it should not be included in the file.

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all]