Application import doesn't work

Hello all,

I created an application in Local Mode in Design Studio 1.6.

The application is in SAPUI5m mode and uses only standard objects (CSV-Datasource, Panel, Icons, Filterpanel, Geomap, Checkbox, Textbox).

When I export the app, it creates the zip-file with the exported referenced files, but I cannot import the application again. I tried local and BO-mode.

There's no error shown, I just cannot click any buttons (see screenshot).

It works for other applications. But not for this one specifically.

How can I find out what's going wrong?

Thanks and best Regards,

Moritz