UPdate manager embedded with VCSA 6.5 and UMDS

Hi,

We have upgraded vCenter from 6 to 6.5 version and after upgrade when trading to download patches from External UMDS getting below error.

Incompatible repository. Provide a repository from VMware vSphere Update Manager Download Service Incompatible repository. Provide a repository from VMware vSphere Update Manager Download Service

Please suggest.