Missing Content Types

[r-dannhauer]

We used the Concerto VM (Version 2.3.6) solution and played around a bit. Got a screen running, with some content, all is well. Then we added the concerto-iframe plugin to display the local weather. problem is that with the installation of this plugin I only have two content types left. Image and Text. The rest is not available anymore.
Here the symptoms:

• Missing a lot of content types for new content
• Old content in feeds is being counted correctly, but not displayed in back end (unless it's text or images)
• Screens display content correctly, working as intented

Things I tried:

• restart
• removing the plugin
• restarted again
• install concert manykinds, hoping that this will bring contents back
• nope
• restarted, yet again
• still nothing

Would be great if you could help me out.