1099-K Wks. Message says to double-click on the field to select form on which to report this income but when I do, nothing happens. Keeps redirecting to "fix my return"

"Check This Entry
From 1099-K Wks (eBay): A link to Schedule C or another source for the amount reported in box 1 must be selected. To associate this amount with an activity on Schedule C, D, E, F, or Form 4835, double-click on the field provided. Otherwise check the box that applies to this income. If the amount was reported in error, there is a box in the reconciliation section below for that purpose."  ...Nothing happens when I doubleclick and I can't click on boxes since they're greyed out. I reported my eBay sales of business assets.