I do not play chess much. Recently a friend reached out to play some online games. We ran into an odd situation that I cannot find a rule on.
His White pawn was at g2 and my Rook was still at h1. He planned to take the rook with his pawn to promote it, but the game would not allow him to make the move and we couldn't figure out why.
Is there something illegal about that move? There were no underlying issues with the pawn movement that would leave the king in check or something similar.
Addendum-Per the answer below, I asked him about popups getting blocked. He said he had no problem getting the promotion going forward, but was being blocked from taking the rook.