Hello gaetano liggieri,
As per our perception, you added your own Custom CSS before, so that this issues is arise. And you are using the free version and posted the query on pro version, it also made us confusion. If you have added any Custom Code from your side, please remove that codes as well as the above provided codes. After that the problem is not solved again, please write your query on theme respected forum.
Looking forward for your answer.
Best Regards,
Acme Supports