Logo will not "save"

The plugin will not allow me to save the logo. I can select/upload it, but when I Save Changes, the logo is de-deselected, and the box is unchecked. I’ve used this plugin before, with similar theme & plugin configuration without this problem (Enfold theme from Kriesi) I’ve tried deactivating other plugins, and it doesn’t seem to help. Plugin is freshly downloaded from the repository. I’m at a loss as to what’s going on. Ideas? Nothing to see as I can’t enable it this way. Thanks!

https://wordpress.org/plugins/launchpad-by-obox/