@AsianBoiEX
first and most important, your yanfly plugins are in the wrong order. That will cause problems and errors sooner or later.
yanfly's plugins have to be in the order in which they are listed on his homepage, top to bottom.
any deviation from that order needs to be changed, and you have a lot of plugins in the wrong position.
second, this happens because of changed screen size and yanfly's battleengine has a setting to scale the actor positions exactly because of this problem.
However there is a good chance that this setting doesn't work for you because of the wrong order - the plugin to set screensize is below the battlecore but needs to be one of the first instead...