Hmmm ... not reproducible here
kamailio version 5.7.4 (x86_64/linux) kamcmd tls.reload leads to
``` 7(126739) INFO: tls [tls_domain.c:371]: ksr_tls_fill_missing(): TLSc<default>: ca_path='(null)' 7(126739) INFO: tls [tls_domain.c:378]: ksr_tls_fill_missing(): TLSc<default>: crl='(null)' 7(126739) INFO: tls [tls_domain.c:382]: ksr_tls_fill_missing(): TLSc<default>: require_certificate=1 7(126739) INFO: tls [tls_domain.c:390]: ksr_tls_fill_missing(): TLSc<default>: cipher_list='(null)' 7(126739) INFO: tls [tls_domain.c:397]: ksr_tls_fill_missing(): TLSc<default>: private_key='/etc/kamailio/certs/myself-key.pem' 7(126739) INFO: tls [tls_domain.c:401]: ksr_tls_fill_missing(): TLSc<default>: verify_certificate=1 7(126739) INFO: tls [tls_domain.c:406]: ksr_tls_fill_missing(): TLSc<default>: verify_depth=9 7(126739) INFO: tls [tls_domain.c:410]: ksr_tls_fill_missing(): TLSc<default>: verify_client=0 7(126739) INFO: tls [tls_domain.c:750]: set_verification(): TLSc<default>: Server MUST present valid certificate ...