Unable to remove SMTP configuration when remote enrollment for LDAP is enabled

[j-chmielewski]

The error message is not specific enough when trying to remove SMTP configuration while remote enrollment for LDAP is enabled:

Core log error:

ERROR http_request{method= PATCH  path=/api/v1/settings}: defguard_core::handlers: msg=Cannot enable remote enrollment for LDAP. LDAP and SMTP must both be configured