Fix: return error when internal_tls_not_provided
Fix: return error when internal_tls_not_provided

When iinternal_tls is empty, prepare should works as usual

Signed-off-by: DQ <5b460793db966fe84244ff3796dd28c1ec367157@vmware.com>

wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,wy65701436/harbor,reasonerjt/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor