The filesystem label has a space in it. You need to change it to remove the space.
But this only relates to OMV3. OMV4 should have fixed that issue.
Absolutely no support through PM!
I must not fear.
Fear is the mind-killer.
Fear is the little-death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing.
Only I will remain.