I am using the WAB DE 2.4. Does the PopUp Panel Widget for 2.4 have the ability to see Related Tables? I tried it out and none of the related tables showed up. I can see them in the popups I configured with the LocalLayer Widget no problem.
Some how you missed the multiple times I answered that relates are not supported in this widget on the widgets download and question page:
Popup Panel Widget Version 2.13 - 10/25/19
ok, I meant to say that when I use the PopUps in the LocalLayer Widget I can see the Related Tables. But, when I use the PopUp Panel Widget I cannot see any related tables.
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