why doesn't this command work

I have been sitting here for a full hour trying to figure out why it doesn't work. Hopefully you guys can help. execute as @p at @s as @e[type=chest_minecart,tag=aeternum.player_data.minecart] if score @s aeternum.player_data.id = @p aeternum.player_data.id store success entity @s Items[{Slot:0b}].components."minecraft:custom_data".aeternum-item_data.healer-class_data.level int 1 run scoreboard players get @p aeternum.player.level