Error while running event Oil_Patch_Organizer::on_player_selected_area (ID 51)
Entity is not resource.
stack traceback:
        [C]: in function '__index'
        __Oil_Patch_Organizer__/control.lua:108: in function 'GridDeposits'
        __Oil_Patch_Organizer__/control.lua:179: in function <__Oil_Patch_Organizer__/control.lua:172>"
20234.601 Info ServerMultiplayerManager.cpp:795: updateTick(53981391) changing state from(InGame) to(Failed)
20234.601 Quitting: multiplayer error.

Same issue in single-player. I selected a center point, tried to select the oil patches, then everything crashed. Running SEK2. Can provide save file if needed:

The mod Oil Patch Organizer (1.1.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Oil_Patch_Organizer::on_player_selected_area (ID 51)
Entity is not resource.
stack traceback:
[C]: in function 'index'
__Oil_Patch_Organizer/control.lua:108: in function 'GridDeposits'
Oil_Patch_Organizer/control.lua:179: in function <Oil_Patch_Organizer/control.lua:172>