Can’t make a swap on Uniswap on Polygon network with a metamask wallet

I can't seem to complete a swap. I'm trying to buy AAVE with usdc and it is saying that I must allow the uniswap protocol to use my usdc. When I click on it I can't click on confirm. That's where I'm stuck. Also tried to buy it on sushiswap and the transaction kept failing. What I'm I doing wrong