Zoho Task Category Question

Zoho Task Category Question

Does Zoho have a Task Forum?

My Task question is as follows: In the photograph below when I click on the category button it this dialogue box pops up every time. I don't have a clue what it is telling me to do. Each time I click on a specific task like it tells me then click the category again nothing hapens.

Is there a place I can go to get instructions?

Thanks in advance.

Great services by the way!!