based on the error (though I'm sure it looks obvious), it sounds like you've got some clashing when it comes to drawing hp gauges in-battle.
If I had to guess based on the lengthy plugin list you've got there, I'd wager its probably problems with sumrandumdude(SRD)'s battle-GUI/battle-status plugin(s) and yanfly's battle core.
if that helps any... maybe reordering the plugins would work?
and/or try what the person above said.
I kind of want make a map that's just giant version of the player that's they're running around on. Either by stringing together multiple maps or just by shrinking the player sprite for those maps. Actually that might make a fun reveal... The player's on a normal looking map, but then as realization dawns on them it zooms out to show a much larger map that's a giant version of the player.