WPML sync issue – No “Translate independently” button

Hello,

We have a pretty serious issue which turned out we cannot solve ourselves. Our translated pages are strictly synced with the main language page and we cannot unlink the connection. There should be a button labeled “Translate independently” but that button simply doesn’t exist. We also checked the setting twice (we compared it to another site of ours) and everything seems properly configured.

We tried disabling plugins one by one but no luck with that. Any help would be much appreciated.

The page I need help with: [log in to see the link]