How to fix Veeam VIX & RPC errors

I had this errors:-Error: Cannot upload  file to admin share [C:\Windows]. Cannot create folder in guest: [C:\Windows\VeeamGuestHelpersTest].VIX Error: A file was not found Code: 4-Error: Cannot connect to host […] over VIX. Login: […\veeam]. Guest Login: […\veeam].Failed to login to VM: [[…] xxx/yyy.vmx]. User: […\veeam].VIX Error: Authentication failure or insufficient permissions in guest operating system
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