I am using latest stable, 5.8.1 on Ubuntu 22.04. I have some research drives mounted with autofs (nfs). Slicer complains that the locations is not writable when I try to save MRB or MRML files. I can save/write/export everything else successfully.
I assume that the writers for these formats are Slicer specific. Any ideas why they fail where others do not?
Not sure why that might be the case, but MRB will require a a subfolder to be created within the location you specified (so that it can zip things). Perhaps you have a strange permission that allows you to write files but not create folders?
In general you should avoid creating MRBs over a network connection since it will be slower. I suggest doing locally at a location like /tmp and then moving to your network location where you will like to share/store long term.