Error while running event bobinserters::bob-inserter-open-gui (ID 155)
bobinserters/control.lua:1242: attempt to index local 'gui' (a nil value)
stack traceback:
bobinserters/control.lua:1242: in function 'open_gui'
bobinserters/control.lua:428: in function <bobinserters/control.lua:418>

Yup got the same error, worker in 0.18.13

same

4972.061 Error MainLoop.cpp:1202: Exception at tick 39897439: The mod Bob's Adjustable Inserters mod (0.18.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event bobinserters::bob-inserter-open-gui (ID 160)
__bobinserters__/control.lua:1242: attempt to index local 'gui' (a nil value)
stack traceback:
    __bobinserters__/control.lua:1242: in function 'open_gui'
    __bobinserters__/control.lua:428: in function <__bobinserters__/control.lua:418>
4983.855 Loading map C:\Users\TheCh\AppData\Roaming\Factorio\saves\0.18 experimental.zip: 25944636 bytes.
4983.937 Loading level.dat: 115736444 bytes.
4983.944 Info Scenario.cpp:187: Map version 0.18.14-1
4987.044 Warning BlueprintShelf.cpp:825: Record (0, 545) contains an empty blueprint; removing
4987.492 Loading blueprint storage: Local timestamp 1584559260, Cloud timestamp 1584559257

I'm looking into it.
it works fine in 0.18.12 (0.18.13 unconfirmed)
As far as I can tell, there is nothing wrong with my code, it's an issue with on_gui_closed event and player.opened = gui. (This lets you close the GUI by pressing E or Escape, or closes it when you open another GUI)
I can try to fix it, but it may be a game bug, not a mod bug.

The appears to be a base game bug, related to the defines.gui_type check. Apparently the list was changed in 0.18.14 due to removal of the kills GUI, and was done incorrectly in the game code. They've already fixed it for 0.18.15

Just a notice: Bobingabout you are the best btw :-D

same