Coss.io is a scam crooks
I have little money in the exchange. Last January 2020 they emailed me about changes in their website and now the website is up and running I can no longer log in. I have emailed them twice and no response. STAY AWAY FROM COSS.IO EXCHANGE. You're not dealing with serious people. I'm sure you'll find better exchanges and crypto sites out there. It's a fact they are a scam.