Emoncms.org Apps locked

In my opencms.org, I removed a feed that was already present in an app (solar). As a consequence, the app crashed. I tried it again, as a consequence a second app crashed. When I start both apps, the waiting circle starts turning forever. I tried removing the feed, but even without the feed, I can’t get in the config-menu of the apps.
How to solve this?
BTW: OEM is really great. I feed OEM using Arduino → USB → Node-Red → MQTT, and I use the apps and graphs from opencms.org to show in openhab2. I use openhab2 as well for actual readings. Besides electricity, I measure gas and water consumption using reed-relays. I haven’t regretted one single minute I’ve chosen OEM.