for some reason it outline and info stays (without graphics) on the screen, cannot be removed with robots. and when mining with hand it gives error

The mod ○ Lignumis (1.0.39) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event lignumis::on_player_mined_entity (ID 71)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'mine_entity'
lignumis/scripts/wooden-rocket-silo.lua:109: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

So you removed the rocket silo before this happened? Did you do it by hand or with bots?

Looks very weird. I could reproduce it, but it seems it doesn't happen when I place a new rocket silo. I have a fix ready where the invisible ready rocket silo still remains but you can just remove that as well and no error occurs. I'll release it today.

The fix is released.