"Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again." is a Windows error that you will usually find reported in Windows Event Viewer Application Log as a 1219 error.
This is usually due to a connection to the Repository share being stuck open.
Rebooting the vRanger server will resolve the issue but if this is not an option you can:
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