The mod The Blueprint Designer Lab (1.0.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event BlueprintLab_design::on_gui_click (ID 1)
LuaPlayer doesn't contain key clean_cursor.
stack traceback:
[C]: in function 'index'
__BlueprintLab_design/scripts/logic.lua:130: in function 'ReturnBlueprintImport'
BlueprintLab_design/scripts/logic.lua:93: in function 'ToTheWorld'
BlueprintLab_design/scripts/logic.lua:9: in function 'OnLabButton'
BlueprintLab_design/scripts/gui.lua:46: in function <BlueprintLab_design/scripts/gui.lua:44>

This has been reported before, but this mod is dead. I have a replacement that fixes this issue: https://mods.factorio.com/mod/BlueprintLab_design/discussion/6246456ed1702e6bed9195a3