Hi @MBG 

Welcome to the community forums. 

Have you had a look at your Backup Proxy? It is online?

Duplicate issue: I think this question was raised again in order to resolve your issue @MBG.

Could you please take a look at this link as the issue relates to yours. If this does not resolve your issue, kindly open up a case with Veeam Support: https://community.spiceworks.com/topic/1690569-veeam-backup-and-replication-issue

@Madi.Cristil - can you close this topic and reference the other one here 

This is the second time the person has asked the same question.

@Chris.Childerhose Dear thanks for your support but still not any satisfactory solution received i have. thatswhy again i open this query and still trying to fix this issue. 

Object reference not set to an instance of an object is a generic programming error. It means that one of the variables is NULL unexpectedly. If you could provide some logs from the backup job this could potentially shine some light on WHAT is unexpectedly returning NULL. I’d expect this to be a database record not quite being correct for a component such as a proxy or repository.

Yes but you don't need to open multiple topics with the same question keep it in the one thread for consistency.