Thank you for contacting Telerik support.
The Generic content module is obsolete in 4.1, that is why you cannot use its functionalities anymore.
What you can do is to transfer your items in Lists module, where taxonomies are not available. You can also use the News module and create your items there. This module has the samoe functionalities as the Generic content module.
Could you please decribe your use case scenario with some more details? Why do you need to use tags for lists? Are you going to tag the whole list or you need taxonomies per a single item?
Looking forward to your reply.
the Telerik team
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