Your plugins are in the wrong order. For the yanfly plugins please make sure they are in the order found on this page. If that doesn't solve the issue try disabling all your plugins, check if the issue persists, if it does it's not a plugin issue, if it doesn't start enabling your plugins one by one and seeing if the issue remains. Let us know how you get on.
Note: You have two copies of YEP_X_Subclass (the topmost one may be all that's wrong with your plugin order but I'm not certain)
I checked my plugins. It's the Battle Engine Core that is causing problems. I've tried rearranging them in the recommended order and even done my own, but nothing has been fixed. I hope my MV version isn't out of date. It is 1.5.1. And the Battle Engine Core version is 1.36b.
MV is at 1.6.1 at the moment. You also have two cases of the Subclass plugin. Yanflys class plugin can also influence SV battlers. Also by system do you mean the database or that they exist in your folder?
Yanfly battle engine core 1.45 is what you would ideally be pairing with MV version 1.5.1. It may be worth updating your plugins to avoid compatibility issues. Update MV as well if possible - I've never had to do it so I can't advice on how you would go about it or what effects it will have on your current project.
Fekken kill me. I unknowingly swapped out two important events's codes and saved the game to test it. I'm just doing this for fun and the fun has now been replaced with excruciating torture.
Is this how game developers feel all the time?
WAIT HOLY S***
MY LAST POST ASKING FOR HELP ON AN EVENT ACTUALLY SAVED IT
OH MY GOD