I am building a module to help us track our contracts, really nothing overly special.  The trouble I am running into is that when I click the button to move to the edit control to create a new contract entry I get 

DNN Error

No sites currently exist for this installation. - 503 Service Unavailable

The strange part is that the view control works fine, only the Edit control triggers the error.  I am running DNN 8.0.0 on a Windows 10 box and not using any non-stock DNN functions (no telerik)  I am not sure what other info to add.  There is nothing logged in the event viewer.  

If there is any more info that I can add that will help to figure out the issue please let me know.

Ugh....    I swear I wasn't getting anything useful in the DNN event logs yesterday.  Where is the smiley where I bang my head on the wall?  So the issue turns out that I was trying to use required field validators  on a calendar date select control, which does not work.  Man, I am glad it was simple but it is so frustrating.  Thanks for the help and for pointing me in the right direction