Grando
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This isn't a bug. Don't be dense.
1) If it's really your first turn, you can occupy that space yourself and attack from there.
2) In the game, there's a spell called Remove Obstacle, which, you (Sloth_D and Sisasty, I mean), might be surprised to learn, actually does something!
By the way, you should also check if the opponent had it in their spellbook; it might just be a joke if they did.
And, Sisasty, I'll repeat my main point: if anything needs to be revised, it's the wording of the rules regarding stalemate situations, and then it will be clear for any specific game. Situations like this have happened before.