Dear Malvine,
We regret to inform you that the matter you are experiencing is associated with the ‘Remove Unused CSS’ feature of the WP-Rocket plugin.
Any issues arising from third-party plugins fall outside the scope of our support services. Should you encounter any further difficulties with such plugins, it is advisable to reach out directly to the respective plugin authors for assistance.
Thank you for your attention to this matter. We appreciate your understanding and cooperation.
Best regards,
The 8Theme Team