In the preference set transitions to frames instead of a broken up second
Was already set to frames.
I isolated the problem. I use Crossfade as my default transition. If I have a clip with a transition at the end to another clip and add the Distort -> Warp Stabilizer effect, the 2nd to last frame of the outbound transition is black/blank. If I render the sequence, it fails and points me to the start of the transition. If I shorten, or lengthen, that outbound transition by a single frame, the black/blank frame disappears and the sequence will render with no problem. I tested with several other transitions and only Crossfade fails, so I changed my default transition to NewBlue Dissolve and no longer have the problem.