Zlib decompression error: [-3] | Failed ... - Veeam Software
https://www.veeam.com/kb179529.07.2013 · Veeam Backup & Replication 6.5 added network traffic verification in order to detect corruption which might occur when sending data from a proxy to a repository or other proxy. Decompression errors in 6.5 and later are unlikely to be caused by a malfunctioning NIC, router, or other network device if the repository server is using a local disk.
KB2442: Troubleshooting VDDK error 16053 - Veeam Software
https://www.veeam.com/kb244206.02.2018 · Open the folder that matches the name of the failing Job. Find the log file matching the nomenclature Agent.Job_Name.Source.VM_Name.vmdk.log. Open the file with any text editor and search for: VDDK error: 16053 (One or more required subsystems failed to initialize) Example snippet: [DD.MM.YYYY HH:MM:SS] < 12620> cli| ERR |Command 'Open' has failed.