PCG Load Level, then Enemies

Hello all, I am currently trying to build a small project in which a level is randomly generated (using 30 different tiles), then enemies spawn, then you play until you defeat all the enemies. I am encountering an issue though, where I need to make sure the enemies spawn after the level is loaded, however when I use the gather node to make sure my enemy spawner is dependent on the level loader, I get this error:

When I try to put this code inside the level loader, the level does not load.
(I will attach the level loader code as well for reference. The warnings do not seem to effect the loading of the level.)

Does anyone know how to fix this?