Related threads that I have looked at and tried the proposed solutions:
An entry that I found in the System_Engine log file that looks like it might be helpful:
|ERROR||20170322T115223.157-0600||7868||8840||Internal\Engine||20170322T115221.000-0600||ServiceManager: CreateProcess () failed with error code 2. Command line: \QlikSenseBrowser.exe --qvbrowserport=9076 --qvbrowserrelversion=11.0.0 --qvbrowserenginepid=7868 --disable-gpu|
Also, by using the debug mode console I can see that the internal server error is occurring on a get request to http://localhost:9070/api/hub/v0/privileges?cachebust=1490206393856, which references require.js:23897
I have already tried reinstalling with administrator permissions and I am not using a proxy service. I have also tried installing Qlik Sense 3.2 instead and get the same error.