Usually if an error appears in the console but isn't crashing the game, it's fine. It happens pretty often with a lot of VisuStella plugins and it won't show up when your finished game is exported. Seems like whatever plugin is using SpecialA1Tiles is causing it to appear, so maybe turn your plugins off one by one and check if it still happens to find out which one is doing it.
Well that's good, i didn't know if it would affect the actual game or not. i got rid of the special A1 tiles, it was from a set i bought and they don't even autotile anyway, every square of grass has an ugly dark ridge, so it was a waste of money lol I just got it recently, so it wasn't the original cause and is only responsible for the red bit.
with SpecialA1tiles off It seems the only time i get the popup is if core engine is active, doesn't matter if the zoom plugin is on or not, it doesn't popup unless core engine is. that's annoying, wish i knew how to get rid of it, the one thing that was suggested before i did try and it didn't help. -3-
It seems to only activate on the map with your spawns tho, so idk if anyone else has had it happen or just me? either way, i'm glad it doesn't seem like it will cause any real problems.