The mod Picklock's Inserter (1.100.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Picks-Inserter::on_tick (ID 0)
Picks-Inserter/control.lua:163: attempt to get length of global 'PI_db_inserters' (a nil value)
stack traceback:
Picks-Inserter/control.lua:163: in function 'PI_modify_all_marks'
Picks-Inserter/control.lua:548: in function <Picks-Inserter/control.lua:543>

Thank you for the information. I will have a l.ook at it.

Bug fixed with the following versions:
Factorio V1.0: Picklocks Inserter V1.100.3
Factorio V1.1: Picklocks Inserter V1.110.3