Datasets and connection disappeared after restoring from a backup

Hi everyone. Need help.
On the website in Editor there were datasets on pages and numerous connections to repeaters and page code. After setting Multilingual feature all the datasets and connections to them in Editor disappeared. Restore from backup doesn’t help.
Please help to restore the working version of the website.

looks like problem is solved. Content manager disappeared from the site, I added it back and all the data and connections had restored.

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