Do you think Gonzalez was fouled in the build-up to their goal? Dias played a difficult ball into him, and the pitch wasn't the best. He struggled to control it and was off-balance. An Orient player came in from the side, and as he was falling the ball broke to the 'goal-scorer'. As the Orient player came in from the side he came in with arms raised on his shoulder but it looked like Gonzalez was already going down, and so no foul was given.
Gonzalez lost possession in a dangerous area but I think that is part of the learning process. The Orient player fell on his abdomen / side and has probably caused dome bruising, hopefully his rib-cage is OK.