I used the a2hosting service, and buy the new domain from godaddy.
And so I changed the DNS name server godaddy to cloudflare, and next verified my domain in the Cloudflare.
And I tried to change from DNS to a2hosting nameserver IP (126.96.36.199 / 188.8.131.52 / 184.108.40.206 / 220.127.116.11).
However, cannot to change IP due to invalid IP error.(DNS Validation Error (Code: 1004): Content for A record is invalid. Must be a valid IPv4 address (Code: 9005))
please help to me.