I'm using Jelastic with Flow AppEngine in Switzerland to host some applications and just recently after changing a configuration file (and hitting Save) the environment became unresponsive from an admin panel perspective. It loads all fine from the front-end but I don't think my configuration took place as I didn't have a chance to reload the service (NGINX) after having touched the config.
The behavior I see is that right after logging in to the administration panel, the loader keeps on spinning with the "Loading user data..." message and never finishes. The panel I login to is: https://app.appengine.flow.ch which seems to be using the latest Jelastic release.
UPDATE: After a long time waiting, it's now moved to "Get environments..." and it's currently stuck there.
Seems like a platform error. Recommend that you contact your hosting provider for help to resolve it.