GnuPGP Encryption

SYSTEM INFORMATION
**OS type and version:CentOS Linux 8.4.2105
**Webmin version:1.981
**Usermin version:1.823

Generating new key via usermin fine, sending key to key server gives the error gpg: “” not a key ID: skipping. From what I understand you need to prepend 0x to the key ID, as in 0x6789ABCD but there is no way to do so in usermin? Perhaps another way to do this?