I have the same issue (error saving) and I guess it might be about user rights?!
When I try to create a new sitemap I get the message “successfully created”, but actually it wasn’t created.
Maybe one of the more experienced members can help?
I would prefer to use habmin rather than editing the config files manually.
I tried to change ownership of files but no luck.
root or pi the result is always the same.
I do not mind editing the files in vi but I would like to use habmin too.
the strnge thing is that items are saved…
If you are talking about saving xx.sitemap configuration files. I have deleted xx.sitemap.new file before starting the server, that fixed “saving error” in habmin.