Fixed: Error 503 Service Unavailable
I setup a site with few html pages for my SPA application on my windows 8.1 and IIS 8.5 laptop. When I tried viewing the site in browser, I kept getting 'Error 503 Service Unavailable'. I viewed app pool, it was stopped. In some cases, just starting the Application pool for the site may very well fix the error. But my site did not start!. When I looked at the event viewer I could see the below errors repeated many times: The Windows Process Activation Service failed to create a worker process for the application pool '<sitename.com>'. The data field contains the error number. When I clicked the Details tab on the event viewer, I could see : Binary data - In words : '8007012B'. I did not get much help when I viewed the data via Err viewer. The way I fixed the issue was to switch 'Load User Profile' to false. It can be accessed by getting into IIS > Application Pools>' select your application pool'> Advanced Setting...