D-Link dir-645: Cannot save any configuration changes in LUCI

Hello,

I just installed openwrt 18.06.1 on an D-Link dir-645 device. LUCI and ssh is working, BUT I CANNOT DO ANY CHANGES. It looks a bit like described in https://unix.stackexchange.com/questions/350763/openwrt-fails-saving-changes

Perhaps I'm a victim to 'Provided Image too big to save overlay'?

What could I do?

Kind regards,

Aanno

Impossible, your device is 8 MB flash per the wiki.

Flash again (using the sysupgrade). Yes, perhaps very odd, but it has helped on some devices.