Hello, found something else.

Notice:
Error while running event on_tick (ID 0)
Given item is not a blueprint.
stack traceback:
__RadarGridGuide__/control.lua:69: in function 'isPlayerHoldingRadar'
__RadarGridGuide__/control.lua:138: in function 'updateRadarMarkers'
__RadarGridGuide__/control.lua ...

Hello, just found out messages on the mods portal don't send a notification.

This error:
RadarGridGuide/control.lua:71: bad argument #1 to 'pairs' (table expected, got nil)

occurs when you make any blueprint and uncheck entities, or make a blueprint consisting only of tiles.

I've fixed it with ...