Rpg Maker Developers Group

I just put in the Yanfly Party System script so I could fix a issue of my initial party leader being locked in position but when I did my usual play test and reached a battle and I pressed fight, there was a NoMethodError in line 988 of the battle command list script and mentioned some sort of undefined method called 'move_x' for nil:NilClass but I didn't see such when looking in the script. I tested things by removing the party system script and the play test worked just fine, including the battle part. I added the party system script back in and removed the battle command script to further test my theory and the same exact error happened but in line 318 in the scene_battle script. I don't understand why the error even occurs since the battle command list script is also by Yanfly and the Scene_battle script line 318 only says 'next_command'. I'm unsure as to why the errors occur so I'm hoping I'll find a solution here. Thanks for taking the time to read this.

Edit:
Link to the party system script:
https://github.com/Archeia/YEARepo/blob/master/Menu/Party_System.rb
Link to the battle command list script:
https://yanflychannel.wordpress.com/rmvxa/battle-scripts/battle-command-list/

Edit 2:
https://www.rpgmakercentral.com/topic/509-simple-side-view/?/topic/509-simple-side-view/=
https://yanflychannel.wordpress.com/rmvxa/core-scripts/ace-core-engine/
https://yanflychannel.wordpress.com/rmvxa/battle-scripts/battle-command-list/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/ace-equip-engine/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/barehand-trait/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/skill-cost-manager/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/skill-restrictions/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/skill-steal/
https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/steal-item/
https://yanflychannel.wordpress.com/rmvxa/field-scripts/gab-window/
https://yanflychannel.wordpress.com/rmvxa/field-scripts/region-battlebacks/
https://yanflychannel.wordpress.com/rmvxa/menu-scripts/ace-item-menu/
https://yanflychannel.wordpress.com/rmvxa/menu-scripts/ace-menu-engine/
https://yanflychannel.wordpress.com/rmvxa/menu-scripts/ace-skill-menu/
https://yanflychannel.wordpress.com/rmvxa/menu-scripts/system-options/
https://yanflychannel.wordpress.com/rmvxa/core-scripts/ace-message-system/
https://yanflychannel.wordpress.com/rmvxa/menu-scripts/ace-menu-engine/party-sized-menu/
https://yanflychannel.wordpress.com/rmvxa/battle-scripts/state-animations/
https://yanflychannel.wordpress.com/rmvxa/battle-scripts/victory-aftermath/
https://github.com/theoallen/RGSS3/blob/master/YEA/Global System Option.rb
http://himeworks.com/2012/10/effects-manager/
http://himeworks.com/2013/04/custom-event-triggers/
http://himeworks.com/2013/04/stacked-events/
http://himeworks.com/2013/03/event-followers/
http://himeworks.com/2013/12/follower-move-routes/
http://himeworks.com/2014/12/scripted-action-trigger/
http://himeworks.com/2013/04/camera-target/
http://himeworks.com/2013/03/troop-battle-bgm/
http://himeworks.com/2013/09/character-flash/
https://www.rpgmakercentral.com/topic/7539-mana-shield/
https://www.rpgmakercentral.com/topic/7571-blue-magic/
https://www.rpgmakercentral.com/topic/7540-banish/
http://himeworks.com/2013/04/effect-add-self-state/
http://himeworks.com/2013/07/message-skip/
https://www.rpgmakercentral.com/topic/5733-csca-region-switches/
https://www.rpgmakercentral.com/topic/5475-csca-snippets/
https://www.rpgmakercentral.com/topic/10702-csca-splash-screen/
https://forums.rpgmakerweb.com/index.php?threads/quest-log-script.30961/
https://www.rpgmakercentral.com/topic/26652-show-faces-instead-of-character-on-saveload-screen/
https://rpgmaker.net/scripts/319/
https://rpgmaker.net/scripts/763/
https://rpgmaker.net/scripts/574/
https://rpgmaker.net/scripts/524/
https://rpgmaker.net/scripts/506/
https://rpgmaker.net/scripts/181/
https://rpgmaker.net/scripts/261/
and the script I got after the issue first occurred as a way to replace the Yanfly battle command list:
http://himeworks.com/2014/10/command-manager/

Edit 3: Apparently I looked at the wrong line when I checked so I edited the bit where I mentioned what the line said. anyways, here's screenshots of the lines and the error messages.