New Post: Hosting as web app, backend crash

I have a site running on a virtuel server. Everything works great.
Then I uploaded by FTP to a Azure web app. Still everything is working.

Then I upgrade the app to standard(from basic), to support SSL(not confugured with SSL)
When I try to access backend, i get an error that a file does not excist.

If i then upload the folder /composite the site is running for some minutes.
Then a new file is smashed, and backend can not be accessed.

After downgrading the plan, everything is working again.

Frontend is working with no problems