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Hey @ionut1453 !
Most of the time, this error pops up because of using a plugin that performs asynchronous queries. If it’s not WP Rocket, it might be coming from somewhere else. Please check out our documentation on the matter 😊 You can find it here: https://meowapps.com/fix-cookie-check-failure-wordpress/
The best way to troubleshoot would be to deactivate all the other plugins first, making sure AI Engine works properly on its own. Then re-enable the others one by one until you find the one causing issues. 🕵️
It would be great if you could make a backup or duplicate your site first too, better safe than sorry. You can use BlogVault or another backup tool for that.