CRITICAL_ERROR:
Line 345 /var/www/u1290155/data/www/zvizdez.ru/class2.php

Error reported as: [3]: Core settings saved - backup made active.
CRITICAL_ERROR:
Line 347 /var/www/u1290155/data/www/zvizdez.ru/class2.php

Error reported as: [4]: No core backup found. Check that your database has valid content. If not, please run the Reset_Core utility to rebuild your core settings.
After rebuilding your core please save a backup from the admin/sql screen.