I just ran in to another error and figured I'd share in case you want this one as well when you're working on the other fix.
I disabled the Spill Excess Items setting and then used the selection on a full Passive Provider Chest and it gave the error below. (edit - I reenabled the Spill setting and then tried again and it still gave the same error.)
The mod Big Containers UPS+ (1.0.5) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event BigContainersUPSPlus::on_player_selected_area (ID 53)
BigContainersUPSPlus/control.lua:72: Arguments count error for 'spill_item_stack': Expected 1 argument but 2 were given
stack traceback:
[C]: in function 'spill_item_stack'
BigContainersUPSPlus/control.lua:72: in function 'transfer_inventory'
BigContainersUPSPlus/control.lua:132: in function 'replace_container_entities'
BigContainersUPSPlus/control.lua:147: in function <BigContainersUPSPlus/control.lua:146>