Help troubleshooting tree volumes

Hi, I’m having a hard time with trees.
I keep getting:

Selecting finite volume options model type explicitPorositySource
    Source: porosity_0
    - selecting cells using cellZone Tree_0

job aborted:
[ranks] message

[0] application aborted
aborting MPI_COMM_WORLD (comm=0x44000000), error 1, comm rank 0

I can try to clean the meshes by hand but they are pretty clean already.

Where should I start troubleshooting?