Inserting a Table Inside a Scrolling Panel

Three things:

The table was sitting above the panel, not in it. Drag it until the cursor is within the panel and drop it. the table will move to align with the panel. You can tell if the object is in the panel, because it will disappear from the timeline, and move under the panel. You have to expand the panel to see it.

The panel was larger than the slide, so the bottom of it (and the table) was cut off.

I put an object on the layer to close it. I kept the "X" from falling into the panel (where it could scroll out of sight) by locking the panel on the timeline and positioning it. It is outside the panel, but the panel is unlocked, so you could easily lose it to the panel if you try to move it just a bit.