Origin errors are typically caused by either a mismatch in DNS records or the SSL setup between your original setup and the Ezoic setup, or by the host or a security layer blocking requests going via Ezoic servers.
It's a good idea to first check that the DNS records at your host match those you have entered at Ezoic, and that your SSL settings are correct - Using SSL with Ezoic
If you have recently moved hosts, then the origin server IPs will likely have changed and the copy of these in your Ezoic account needs to be updated accordingly.
Here are instructions on how to update your DNS records:
How To Update / Add DNS Records and Subdomains