The error you specify is usually caused by DNS. If you want to solve the problem quickly, you can connect to ESXi with WinSCP and upload. Activate SSH service. Then connect to ESXi host with WinSCP. When you enter / vmfs / volumues /, you will see the datastores. You can upload here.--
vBlogger, vExpert, Cisco Champions
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I set the DNS manually, but problem exist.
try to upload directly to ESXi or make sure that port 902 is open between VC, ESXi and client that you are using to upload files
Although you set the DNS server for the ESXi, did you set the name resolution works correctly? Do ping the FQDN from each side, from the ESXi host and the client system.Please mark my comment as the Correct Answer if this solution resolved your problem