Received bad status 302 on server request to update managed asset
After installing BPM 8.5 release 6, following error occurs when trying to upload a server file on Process Designer:


The ProcessDesignerInstallationDirectory\workspace.metadata.log shows:
!ENTRY teamworks.appserver.websphere 4 0 2015-06-10 12:33:53.028
!MESSAGE
[com.lombardisoftware.server.ejb.repositoryservices.ManagedAssetsClientAPI createManagedAssetAE] CWLLG2212E: Received bad status 302 on server request to update managed asset
cd <BPM Dir>/bin
./wsadmin.sh -connType NONE -lang jython
wsadmin>bpdServer=AdminConfig.list("BPMProcessCenter").split()
wsadmin>bpdServer
['(cells/PCCell1/nodes/Node1/servers/server1|server-bpm.xml#BPMProcessCenter_1385413578191)']
wsadmin>print AdminConfig.showAttribute(bpdServer[0],'useHTTPSURLPrefixes')
false
wsadmin>
wsadmin>AdminConfig.modify(bpdServer[0], [['useHTTPSURLPrefixes', 'true']])
''
wsadmin>print AdminConfig.showAttribute(bpdServer[0],'useHTTPSURLPrefixes')
true
wsadmin>AdminConfig.save()