AppDynamics displays blank page

[CommunityUser]

I have installed AppDynamcis on-premises version. All of a sudden today, AppDynamics displays only a blank page. I have restarted the machine/service number of times but in vain. I also verified the event viewer which says the service is running. What is the solution?

[CommunityUser]

t_aruns4, glad you verified that the license is all sorted out etc. The blank page when hitting the Controller URL (https://host:port/Controller) could be related to the browser side of things as well. Please note that AppDynamics Controller UI depends on Flash. If for any reason, your browser is unable to provide a Flash runtime environment, then there is a good chance the UI will not be as you'd expect. See https://docs.appdynamics.com/display/PRO42/Using+the+Controller+UI for details around the Browser side reqmts. Suggest you try accessing the URL from a totally different machine / browser combination to see if that works... Kindly post back if that still didn't help

[CommunityUser]

I had tried on different browser/machine combinations. Still doesn't work.

[CommunityUser]

t_aruns4.. hmm, in that case we may have to investigate this closely. I'm not sure if you want to upload the Controller logs etc onto the forum(assuming you are doing this trial on-premise). If so, can we take this troubleshooting into a ticket? Pls email help@appdynamics.com with the details. You are welcome to copy me hari.subramaniam@appdynamics.com and we will see what's going wrong and why the Controller UI is showing up blank.

One other thing to try would be to see if the admin page shows up. 

http(s)://<hostname>:<port>/controller/admin.jsp

To eliminate any port-blocking or such network level issues, you can try this from your desktop command line

telnet <controllerhost> 8090 

(assuming you've left the default http port at 8090. or use the one that you've configured the Controller Appserver to listen on)

Confident, one of those steps should yield us some clues.. 

[CommunityUser]

The reason was my trial period has expired. But even after repalcing the old license file with the new one that the AppDynamics team had given me, I still face the same problem. I stopped all the AppDynamics windows services and restarted them after replacement. I, even restarted my machine. What could be the trouble?