Won't allow move out of check

In game 1750081 with Black to more. His only move is enpassant F4-G3 Wharfrat says the system won't allow him to make the move? I had just advanced the pawn so it should be a legal move. And his only way out of check.
Any ideas?

Originally posted by wrhine
In game 1750081 with Black to more. His only move is enpassant F4-G3 Wharfrat says the system won't allow him to make the move? I had just advanced the pawn so it should be a legal move. And his only way out of check.
Any ideas?

He probably doesn't know how to move.

Tell him click his pawn on f4 so its highlighted, then click on the g3 square. Click move.

D