Problems with v3

The other day I clicked from UNIv3 on “allow the uniswap protocol to use your tokens” because it wouldn’t let me do the swap.

The thing is that I paid gas for the transaction and I still have the coins, but now when I go to swap I get “swap failed cannot estimate gas”.

I have ETH to pay for the gas, I get into V2 so that there is liquidity and I get the same message all the time.

Thank you very much for your help.