iBooks error message for ePub

We are trying to figure out the error message after uploading our ePub. Message as follows:

The session's status is FAILED and the error description is 'failed to open ssh session. (16)'

Error: Internal error: Java.net.MalformedURLException: unknown protocol: bundle schema/20/rng/container.rng" at Book/BookAssets

Apple replied saying we needed the latest version of iTunes Producer and update latest version of Java which we have...

Java 8 Updata 191, and iTunes Producer 3.1.1

Any ideas anyone?