Cloudflare DNS Not Working Host Error 520
Go to your cloudflare dashboard
Then click on DNS setting , on your dashboard you can find the ip address columns to write , you will find all the IP address in the description , If these all 4 columns are already filled automatically by cloudflare , then plese wait for the step 2,Rest people just copy all four address and paste ,type should be A, Name (required should be your domain) then copy the ip adddress and paste it in the IPv4 address proxy status should remain proxied, TTL should remain On Auto , you have to paste all 4 IP addresses one by one