Receiving error reusing session.

First use was retrieve document (tocid # 1) and server out in Rest web service.

Second session use was retrieve document (tocid # 2) and server out in Rest web service, which fails.

Info:   Using session : 770
Severe:   com.laserfiche.protocol.HttpException: Not a valid protocol version: 
    at com.laserfiche.protocol.HttpConnection.sendRequest(HttpConnection.java:226)
    at com.laserfiche.protocol.HttpRequest.sendRequest(HttpRequest.java:58)
    at com.laserfiche.repositoryaccess.Session.sendRequest(Session.java:851)
    at com.laserfiche.repositoryaccess.Entry.getEntry(Entry.java:942)
    at com.laserfiche.repositoryaccess.Entry.getById(Entry.java:102)
    at com.laserfiche.repositoryaccess.Document.getById(Document.java:167)