Would you please copy all the MgrLog files.
How did you apply changes related to Network apps in the AppstreamCFG. Whether it was included as part of the installation or after installing the streaming agent you opened the CFG file and made those changes.
If you did the changes by yourself, did you restart the machine after that?
These are the steps that you have to follow.
1. Once you made changes in the AppstreamCFG file, you will have to save it and restart the machine.
2.Login again , applications should be streamed to the endpoint.
These events will be recorded in the log. That's the reason why i am asking you all the Mgrlog files that you have in that folder.