One particular application may be failing to download or launch on one particular computer.
The MgrLog files show the following messages:
ERROR  FSDProxy,FSDProxy::FSDCommunic
WARN  SVSInterface,SvsManagement::Sv
ERROR  Management,Management::Session
INFO  Management,Management::Session
There is a corrupt file or registry key from the problem application that is remaining on the computer from a previous launch attempt.
Uninstall the Workspace Streaming and Virtualization agents to remove any corrupted files, then reinstall the agents.