ERROR: (Hudl/Qwikcut) You must select at least one Clip Angle before adding a play.

This means you have have yet to select a Clip Angle(s) when you're trying to pull in video.

How to Select a Clip Angle when Pulling In Video

1. Click Settings (gear icon)
2. Select the angle(s) your clips were filmed in by double clicking on item on left side (available angles). Item will then be placed on the right side (selected).

Once you've selected the correct Clip Angles, this error will no longer populate when selecting a play.