Quickbooks Web Connector Error: QBWC1012

We’re having this error message periodically in the QB Web Connector, can you help?: Version: Not provided by service Message: Authentication failed Description: QBWC1012: Authentication failed due to following error message. java.rmi.RemoteException: servie error:; nested exception is: com.avankia.appmashups.soap.DBSyncException: com.avankia.appmashups.soap.DBSyncException: org.jdom.input.JDOMParseException: Error on line 4: White spaces are required between publicId and systemId. See QWCLog for more details. Remember to turn logging on.

Error with QB Enterprise 2016 and Web Connector setup

Installing the web connector inside QB Enterprise 2016, and I keep getting an error qbwc1048 about verifying the certificate. I am wondering if there is a known issue or has Intuit added new requirements to the QWC file for security? I found some indication that might be the issue, so I created a copy of the file with the <CertURL> tag but still got the same error 1048. Anyone else see this problem? Thanks!