Site Recovery Manager not working after upgrade - Unable to retrieve pairs from extension server

Products

• VMware Live Recovery

Issue/Introduction

SRM does not work after upgrading from 8.5 > 8.8 , 8.8 -> 9.0.0

• Below error appears on the SRM UI,
  
  Unable to retrieve pairs from extension server at https://broadcom.company.global:443/drserver/vcdr/vmomi/sdk.
  Unable to connect to Site Recovery Manager Server at https://broadcom.company.global:443/drserver/vcdr/vmomi/sdk.
  Reason: Unable to download versions file from Site Recovery Manager Server at https://broadcom.company.global:443/drserver/vcdr/vmomi/sdk. Http response: HTTP/1.1 503 Service Unavailable.
  SRM Server at broadcom.company.global is unreachable.
  
  
• The VAMI site recovery manager services listed below are not operational.
  
  
• SRM VAMI Summary displays alert to reconfigure,
  
  

Environment

VMware Site Recovery Manager 8.x

 

Cause

• A direct upgrade from SRM 8.5.0.5 > 8.8 is unsupported
  
  Perform a step upgrade from SRM 8.5.0.5 > 8.7 and then to 8.8.
  
  
  
  
• If the SRM appliance is not reconfigured using VAMI after an upgrade, the problem also arises.

Resolution

• Refer to Site Recovery Manager Appliance Upgrade Best Practices to learn more about doing upgrades 
• After every upgrade perform reconfigure using VAMI. else this error is expected