Script error - help!

Here's the error that I get:

Error [content0]game\gameplay\alchemy\alchemymanager.ws(196): Could not find function 'GetUnusedMutagensCount' Error [content0]game\gameplay\alchemy\alchemymanager.ws(270): Could not find function 'RemoveUnusedMutagensCount' Error [modautolootmenu]game\player\playerwitcher.ws(739): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(744): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(749): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(754): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(794): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(798): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(802): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(806): Function 'SetItemStackable' does not take 2 param(s) Error [modautolootmenu]game\player\playerwitcher.ws(5481): Function 'SplitItem' does not take 2 param(s) Error [content0]game\vehicles\horse\horsecomponent.ws(189): Function 'GetCategoryDefaultItem' does not take 1 param(s) Error [modcustomlocalizationfix]game\gui\menus\blacksmithmenu.ws(601): Unable to convert from '&array:2,0,SItemUniqueId' to 'Int32' Error [modcustomlocalizationfix]game\gui\menus\blacksmithmenu.ws(601): With parameter 'dismantleCount' Error [modcustomlocalizationfix]game\gui\menus\alchemymenu.ws(62): Could not find function 'GetAlchemyFiltters' Error [modcustomlocalizationfix]game\gui\menus\alchemymenu.ws(126): Could not find function 'SetAlchemyFiltters' Error [modcustomlocalizationfix]game\gui\menus\craftingmenu.ws(103): Could not find function 'GetCraftingFilters' Error [modcustomlocalizationfix]game\gui\menus\craftingmenu.ws(170): Could not find function 'SetCraftingFilters' Error [content0]game\gameplay\ability\playerabilitymanager.ws(623): Function 'SetItemStackable' does not take 2 param(s) Error [content0]game\gameplay\ability\playerabilitymanager.ws(4031): Could not find function 'RemoveUnusedMutagensCountById'

Warning [content0]engine\environment.ws(30): Global native function 'EnableDebugOverlayFilter' was not exported from C++ code. Warning [content0]engine\environment.ws(32): Global native function 'EnableDebugPostProcess' was not exported from C++ code. Warning [content0]engine\showflags.ws(11): Global native function 'DebugSetEShowFlag' was not exported from C++ code.

I'm new to all this and just have no clue what to do