Just download Kendo UI open-source edition
and ensure that it's there.
After some investigation I've found that Telerik team recently replaced Kendo UI Web
(licensed under GPLv3 and distributed WITH grid) with a new product - Kendo UI Core
(licensed under Apache and distributed WITHOUT grid). Here is the announcement
. As you can see in the comments a lot of people were resent the grid is removed. Then Telerik simply disabled comments on this blog post announcement. I presume they can lose a lot of users with this move.
Of course, we can move to Kendo UI Core later and maintain grid ourselves. But it would be better if Telerik changes its position and adds the grid back to the core.
It looks like there are two options:
1. Keep using the grid without upgrading to the new paid Grid.
2. Get a license and always use the latest version of the Grid. It is royalty free, so you can distribute it with nopCommerce.
In both cases (even before when the Grid was open source) if someone wants to use the Grid (as we do in our plugins), they have to get a license for Kendo UI. As most people use nopCommerce as it is then this doesn't really matter for them. It would really matter for vendors that want to use the Grid in their products.