Error while running event minime::on_init()
Error when running interface function RSO.ignoreSurface: rso-mod/control.lua:2160: attempt to index field '?' (a nil value)
stack traceback:
rso-mod/control.lua:2160: in function <rso-mod/control.lua:2155>
stack traceback:
[C]: in function 'call'
Pi-C_lib/common.lua:384: in function 'remote_call'
minime/scripts/surfaces.lua:449: in function 'blacklist_surface'
minime/scripts/surfaces.lua:124: in function 'create_surface'
minime/control.lua:275: in function 'init'
minime/control.lua:383: in function <minime/control.lua:379>

when debug mode enabled this error comes but there is more to it - https://mods.factorio.com/mod/rso-mod/discussion/6a45381147bcd37254b64da3

This is an error in RSO. My mod calls its remote function when there are no players yet, but RSO assumes that a player already exists, so game.players[1].print() will fail.

It should work again if you change line 2160 of RSO's control.lua from

if debug_enabled then

to

if debug_enabled and game.players[1] then