samba multiple connections to a server or shared resource by the same user are not allowed

Решение.

To solve this problem, try the following steps:

1. Select the “Start” button, then type “cmd“.
2. Right-click the “Command Prompt” option, then choose “Run as administrator“.
3. Type “net use“, then press “Enter“.
4. Look for any drives listed that may be questionable. In many cases where this problem occurs, the drive may not be assigned a letter. You’ll want to remove that drive.
5. From the Command Prompt, type:
   net use /delete \\servername\foldername(where the servername\foldername is the drive that you wish to delete.)

In some extreme cases, you may want to simply use the command net use * /delete