During some arrangements of the pages in Russian this language has lost every link only for this language in the front end.
The answer is always
This page doesn't exist
Error: 0: Using $ this when it is not in the context of the object
Return to the Home Page
Could you share the URL of page where I can see this error?
And share the admin + FTP account also.
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sorry if I insist, I would like to know if you had the opportunity to look at the site with the problem on the Russian language. At this time of year, tourist reservations are made and the lack of language causes us damage.
Thanks for your attention.
Could you check the admin account again? as it seems not working now.
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The error seems come from the template you're using, I tried to assign the home menu item of RU language on your site to Protostar template, the frontend works fine: https://prnt.sc/r7ayj9
Kindly contact the template provider for help to check that error.