Crash occurs when respawning, removing armor containing pocket, or removing pocket from equipment grid.

The mod Adamo Equipment (0.3.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event adamo-equipment::on_player_removed_equipment (ID 42)
Given value has to be larger than or equal to: 0
stack traceback:
[C]: in function 'newindex'
__adamo-equipment/adamocontrol.lua:107: in function 'to_property'
adamo-equipment/control.lua:148: in function 'process_equipment_change'
adamo-equipment/control.lua:201: in function <adamo-equipment/control.lua:199>

What other mods do you have?

Quite a lot... but the only one I can think of that could affect it is using https://mods.factorio.com/mod/ModularLife to give light and heavy armor equipment grids. Possibly https://mods.factorio.com/mod/HardcoreStart affects your stuff on respawn, but again this error also occurs when simply removing a pocket from the grid or taking off armor containing it.
Other than that, https://mods.factorio.com/mod/minime seems to cause conflicts with other mods.
I can give you a full mod list if you think it would help, but there's like a hundred of them and mostly entirely unrelated.

Yeah, tough to say. Almost certainly an interaction with another mod. My mod tracks the effect of each equipment piece and adds/subtracts based on the difference, and likely is in a race condition with another mod where it then tries to subtract past 0. I'll try to make it more robust when I have time.