Oddly enough...I cleared out the Actor Motions Setup so that there were no actors assigned motions at all (I did have enemies still assigned though in their respective Enemy Motions Setup)...and the map does indeed switch over to the scene view except that no enemies or actors are visible within the battle scene view. At least it does eliminate the "No Motion Data Obtained for Enemy..." error screen. Now it's just a matter of figuring out how to populate the scene with the actors and enemies.
Viewing post in Scene Motion Bug?
Looked at the code, the enemy ID is undefined which is what is causing the bug. From your setup, you have custom motions for enemy 1 and enemy 2 from the database. Do you have a battler object being added that is not a battler from database?
Edit: Checking on my end confirms the scene motions to be functional. What version of the main plugin and extension are you using?