The mod Quick Adjustable Inserters (1.1.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event quick-adjustable-inserters::on_tick (ID 0)
__quick-adjustable-inserters__/control.lua:1357: attempt to index local 'prototype' (a nil value)
stack traceback:
__quick-adjustable-inserters__/control.lua:1357: in function 'find_real_or_ghost_entity_from_prototype'
__quick-adjustable-inserters__/control.lua:3046: in function 'validate_target_inserter'
__quick-adjustable-inserters__/control.lua:3975: in function 'update_active_player'
__quick-adjustable-inserters__/control.lua:4103: in function <quick-adjustable-inserters/control.lua:4096>

Steps to reproduce:
1. Place ghost inserter
2. Shift + F on the ghost inserter
3. Choose a pickup position, but do not choose a drop position
4. Ctrl + X the inserter

Thank you for the report, this is fixed in version 1.1.6
The irony of a validate function erroring on a .valid check line. (but it wasn't at fault, it was the cache straight up missing the prototype reference which was a regression a while ago)

Lmao, what a place to error!