I just pick up this mod with a few others and started a sandbox game to see if everything works. So i click the research all technologies button and the game crashed on me.
49.381 Error MainLoop.cpp:1202: Exception at tick 40: The scenario level caused a non-recoverable error.
Please report this error to the scenario author.

Error while running event level::on_gui_click (ID 1)
The mod Warptorio2 Expansion (0.18.50) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event warptorio2_expansion::on_research_finished (ID 18)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
warptorio2_expansion/control.lua:2578: in function <warptorio2_expansion/control.lua:2575>
stack traceback:
[C]: in function 'index'
__warptorio2_expansion/control.lua:2578: in function <warptorio2_expansion/control.lua:2575>
stack traceback:
...Data/Roaming/Factorio/temp/currently-playing/sandbox.lua:71: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>
stack traceback:
[C]: in function 'research_all_technologies'
...Data/Roaming/Factorio/temp/currently-playing/sandbox.lua:71: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Full log:
https://pastebin.com/rTn8PBfK