In response to the news that a New Security Vulnerability Named POODLE has been discovered in a basic protocol used for encrypting web traffic NitroSell has disabled support for SSLv3. Support for SSLv3 had been in place as an alternative to TLS encryption.
Some users trying to connect securely to the NitroSell web server using SSLv3 will have trouble connecting.
NSc Sync will display errors as follows .
SOAP Server Failure: A connection with the server could not be established
Error connecting - A connection with the server could not be established (EROException)
To address the issue, in your Internet Explorer Options enable TLS 1.0, 1.1 and 1.2 as seen in the following screen-shot: