but really why would you need to login to Coinmarket and why don't you use much better Coingecko instead?
I did not noticed this before, or maybe it is just newly added, below login and create an account is 'continue to CoinMarketCap', click on it. It will bring out the latest what is new in CoinMarketCap which is version 3.3.10, below it is 'continue on CoinMarketCap', click on it again, you will be able to access it like Coingecko, not necessarily need to login again like before, but I do not know if someone will be able to manage his/her portfolio without no loggin in, but you will be able to check market, exchanges and the likes as usual.
I just logged in and the site is working. The problem may have been resolved. Try to log-in again.
Yesterday, the site stopped several times, I ask that despite all the profits they make, their services are still bad, and the site stops every time there is a big change in the price.
I used two devices to login now and it worked perfectly. Before, I was unable to use two devices to log in as the previously loggin in device will log out immediately after newly logged in on another device. It is truly now working perfectly.
The positive side is that more people are starting to use Coingecko.
I have been tracking the traffic of both sites since last year, coingecko has been a site hundred of million of people are visiting often, but I still noticed people that visit CoinMarketCap is twice as many as that of Coincogecko.