CSOM Error – Exception calling “ExecuteQuery” with “0” argument(s): The underlying connection was closed

I woke up one morning and seen majority of my scripts started failing with error: Exception calling “ExecuteQuery” with “0” argument(s): The underlying connection was closed On troubleshooting, it was found these were all scripts where I have utilized SharePoint Client Object Model (CSOM). After a thought I immediately pin pointed it to TLS 1.2…