Monitor setting does not work

[cmencar]

When I click the "Monitor" button, the program exits immediately. The message written on the terminal is

stat: cannot stat '/home/corrado/Desktop/*': No such file or directory This tool has been deprecated, use 'gio info' instead. See 'gio help info' for more info.

gio: file:///home/corrado/Desktop/: Error when getting information for file “/home/corrado/Desktop/”: No such file or directory Unable to parse command line: Cannot parse integer value “Desktop Icons” for --active-tab ./iconic: line 466: ColSize / MonIconColumns : division by 0 (error token is "MonIconColumns ")

Notice that '/home/corrado/Desktop/' is an empty directory because by real desktop dir is another one.