I have reinstalled Windows multiple times (For other reasons than this) and I have reinstalled Graal Online multiple times as well as installing packages and this tileset issue continues to come up. I have talked to FBI and other staff members about this and they have told me other people have this issue as well. I think it is a problem with the tileset options not being loaded or aren't there in the first place, but I don't know much about level making, so I could totally be off.
Please look into this as I would love to participate in the Easter events as well as the Easter dungeon this year.