I just updated the mod to the latest version as of the timestamp of this message and loaded my world, 5 minutes in crash.
1632.643 Error MainLoop.cpp:1435: Exception at tick 10722574: The mod Smart Inserters (2.0.15) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Smart_Inserters::smart-inserters-drop-distance-adjust (ID 223)
Smart_Inserters/control.lua:462: attempt to index local 'inserter' (a nil value)
stack traceback:
Smart_Inserters/control.lua:462: in function <Smart_Inserters/control.lua:457>
1632.643 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Smart Inserters (2.0.15) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Smart_Inserters::smart-inserters-drop-distance-adjust (ID 223)
Smart_Inserters/control.lua:462: attempt to index local 'inserter' (a nil value)
stack traceback:
Smart_Inserters/control.lua:462: in function <Smart_Inserters/control.lua:457>"

To clarify, I've been playing with the previous version for hours and hours without any issues.

Rolling back to the previous version for now.

Ill check it's kinda of a strange error

Done, it was a stupid mistake on my part.

I patched something in the space age and forgot to check if the inserter was nil.