baby hates cereal?

ANA • Mom of 2💙 💝

My son is 5 months. One week ago i decided to start the cereal and everything went perfect till yesterday. I dont know why but he doesnt want to open his mouth ( cause i gave him with spoon ) and he crys a lot when i try to give the cereal more than one time. He doesnt want it at all. As soon as i give his bottle with formula he is ok. He drinks it. Do you have any idea why he is rejecting cereal after eating for 1 week. What should i do? Is it better to try afain after a couples of day?