Hi Paulo Please check few basic things:

--Check if proxies selected on groups that you are running VM backups from policy tab -> groups

--Check if all data stores that you are protecting selected on proxies from policy tab -> clients

--Make sure proxies can able to communicate with Avamar server

Also check /usr/local/avamarclient/var/avagent.log on proxy server if proxy showing errors.

Please open ticket with Support if this steps didn't help.