Is there something wrong with Coinmarketcap today? I have tried to both log in to my old account:
Although, I was able to make use of the app right now, I signed out and unable to sign it. I tried forgot password, a code was sent to the email I used to register but the app not bringing up the space to fill in the code and displayed this errorCode:
There was an error completing your request. Please try again and contact api@coinmarketcap.com if this issue persists.
I think this will be resolved.Same thing happened to me, so it's not working and maybe this is new Chinese crackdown because we know that Binance owns Coinmarketcap 
no but really why would you need to login to Coinmarket and why don't you use much better Coingecko instead?
Maybe the Chinese crackdown but I think Binance CEO do not relate his crypto business with his country China when he already experienced some issue back in 2017 or so that led him to move Binance out of the country to Japan. Although the reason is not yet clear, but I think it could just be a minor technical issue which will be solved soon. no but really why would you need to login to Coinmarket and why don't you use much better Coingecko instead?