The mod "Signal Display" (v 1.3.1) crashes when placing Display Panels in the sandbox. I am unsure if this is a Signal Display mod bug, or a bug from the sandbox, so I am leaving you a report here just in case. Save file to reproduce: https://mega.nz/file/4KN1xCaD#wHARnMr7ApJ_1zaX8uDkYKIP8xm5g8HpYwfZd9Qzfxo

Crash message:
The mod Signal Display (1.3.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event signal-display::on_nth_tick(2)
invalid key to 'next'
stack traceback:
[C]: in function 'next'
signal-display/scripts/events.lua:24: in function <signal-display/scripts/events.lua:9>