error when trying out cbe

Hi Genodians

I'm currently looking into CBE and have read the articles and release notes about it.

Now I'm trying it out using the vfs_cbe_init and vfs_cbe runscripts on genode 21.02. When running vfs_cbe i get the following error:

[17:28:25.837] [init -> initialize_cbe -> init -> vfs_cbe] Error: Exception raised: explicit raise in cbe-block_io.adb:753 [17:28:25.837] [init -> initialize_cbe -> init -> vfs_cbe] Error: Uncaught exception of type 'Ada::Exception::Program_Error'

What am I missing?

Kind regards Stefan