Fixed in openmediavault 5.5.13, see https://github.com/openmediava…42e7804dad9d0c3d8197b261e.
This reverting in-place is likely not a "supported" method, but it has worked fine for me so far this evening. YMMV
From a console on your NAS, you can manually download and install the old .deb file:
(Code, 2 lines)
I am having the same problem.. glad I am not the only one.
I believe this is a bug related to a recent change in this pull request #802:
The error is occurring when the following command is executed…