Navigation - two tier

Hi guys,

I dunno if I just need to a break from screen time but I am stuck.

My problem. I I trying to create a two tier tab navigation system but not exactly like the one in the training videos.

I have one tab docked left and another docked to the top. When selecting Cold Store 1 from the left dock I want the top dock to become visible so I can navigate between Section 1 and Section 2.

Error attached when I try to add .selectedTab to my expression.


Never mind. I was able to trace the root of my problem.