I use Even Pickier Dollies: https://mods.factorio.com/mod/even-pickier-dollies

I just installed this mod, so didn't have any configurable valves even crafted yet. I went to move an assembling machine using the above mod and received a crash, and it seems like it came from this mod:

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

Error while running event configurable-valves::Custom event (ID 437)
__configurable-valves__/config.lua:22: attempt to index local 'entity' (a nil value)
stack traceback:
    __configurable-valves__/config.lua:22: in function 'get_useful_valve_config'
    __configurable-valves__/scripts/builder.lua:158: in function <__configurable-valves__/scripts/builder.lua:156>
stack traceback:
    [C]: in function 'raise_event'
    __even-pickier-dollies__/control.lua:220: in function 'move_entity'
    __even-pickier-dollies__/control.lua:244: in function <__even-pickier-dollies__/control.lua:225>

Same problem here, trying to move any type of entity.

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

Error while running event configurable-valves::Custom event (ID 535)
__configurable-valves__/config.lua:22: attempt to index local 'entity' (a nil value)
stack traceback:
    __configurable-valves__/config.lua:22: in function 'get_useful_valve_config'
    __configurable-valves__/scripts/builder.lua:158: in function <__configurable-valves__/scripts/builder.lua:156>
stack traceback:
    [C]: in function 'raise_event'
    __even-pickier-dollies__/control.lua:220: in function 'move_entity'
    __even-pickier-dollies__/control.lua:244: in function <__even-pickier-dollies__/control.lua:225>

+1

Thanks for the report! This is now fixed in the newest release.