Thanks for your response DGrinev.
As per user guide below are the options for contacting support.
You can open online help for Veeam Agent for Linux. ( How i can open online help) .
You can visit Veeam Community Forums at https://forums.veeam.com
and share your opinion or ask a question. (In forum we can't ask troubleshooting help without a support case id)
If you use Veeam Agent for Linux with a paid license installed, you can submit a support case to the Veeam Support Team at www.veeam.com/support.html
. (we are using free version)