Unable to login with Azure DevOps

[Ankit P]

I've AZ DevOps in m organization with SourceTree as Code Configuration Management Tool. When trying to add account for remote connection to Azure Devops with Personal Access Token in SourceTree, it generates following issue

"An error occurred while sending the request. The underlying connection was closed. An unexpected error occurred on a send. Authentication failed because the remote party has closed the transport stream."

This was tried on Azure VM where there are firewall restrictions due to security compliance within the organization however necessary entries has ben added and firewall rules configured still giving the issue.

Any help is much appreciated. This has been a issue for a while.