Are you good with Linux commands?
I’d check the /images directory and make sure the .mntcheck files are in in both the /images and /images/dev folders. If their not there, type:
touch /images/.mntcheck; touch /images/dev/.mntcheck; chmod -R 777 /images
Then try again. See if that helps you out. To check if you have the files, you’ll need to type:
cd /images; ls -a
Then verify that you see the file. the files with a period in front -> . of the name are hidden otherwise.
Also, just verify the permissions of the directory are 777. Though I’m sure we could refine this as necessary, for now, start small and simple. Just perform:
chmod -R 777 /images just to make sure any system on the network can read and write to the directory. Normally the installation does this for you, but you never know.