Unable to view projects in DevTest Portal console

Document ID : KB000105007
Last Modified Date : 05/07/2018
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Issue:
None of the projects (including bundled examples) are visible in the DevTest Portal. Getting errors on the console: <Error id="401" message="Authorization failed"> </Error> 
Environment:
All supported DevTest Environments
Cause:
All Devtest Components were started as executable and as Services.  basically, two processes for each component. 
for example: 
Portal.exe and PortalService.exe were running at the same time . This probably caused locks on the Project folder.   
Resolution:
Stopped all the services .  Started DevTest components as Services  and not as executable.