Zgrab2 cannot automatically load the root certificate of the operating system

[Ameng]

Using the tls function of zgrab2, it was found that almost all tls requests were unable to verify the certificate chain, with surprisingly consistent error codes of x509: failed to load system roots and no roots provided.
What I expect is that zgrab2 can automatically load the root certificate of the operating system itself when I do not specify the root certificate parameters. But it didn't load. Later, by looking at the code, it was discovered that zcrypto seemed to have removed the part of the code that loaded the root certificate based on the system?
I think the parameters should be optional, not mandatory. When I don't specify a certificate, zgrab2 should automatically load the root certificate of the operating system.