no data displayed in webapp

hello,

First: thanks for making this software!

I have a megacarbon setup with whisper storage.

All seems working fine. I get the webapp running. I can start the provided example client. The client reports sending valid data. I get some success write messages from the server (running in debug mode). I see some files appearing in the whisper storage directory as soon as i start the example client. I have set the permissions of the storage dir to world open (to be sure it isn't a permission thing). I see the system folder appear in the webapp and the subfolders for the loadavg_1 / _5/ _15, though they seem to be empty. So I didn't get any data displayed. I double checked all the config stuff. Switch beetween ceres/whisper - no success.

Now, I'm running out of ideas. :(

Maybe, someone can give me a hint or two. Maybe I overlooked something simple in der Docs ?

Thanks.