AutoSSL error: The system failed to evaluate loopback NAT on this IP address because of an error: Bad IPv4

Symptoms

When running AutoSSL on a server with NAT configured, you encounter an error similar to the following.

Looking for potential NAT (Network Address Translation) problems …
5:38:02 PM ERROR ARRAY(0x2d63d38) (ARRAY(0x2d63cf0)): The system failed to evaluate loopback NAT on this IP address because of an error: Bad IPv4: [ARRAY(0x2d63cf0)] at /usr/local/cpanel/Cpanel/NAT/Diagnose.pm line 135.

Description

This issue occurs when the NAT configuration is not one-to-one, such as many-to-one or one-to-many, or when the public IP address is configured on the local interface and as the public NAT address.

Workaround

You will have to work with your network administrator or network provider to correct the NAT configuration.

Additional resources

What NAT configuration does cPanel support?