Can not Activate SharePoint Server Publishing feature in communication site of O365

Question

I just trying to activate SharePoint Server Publishing using Manage site features to be able to use Content editor web part. I found the following Error:

NB:

SharePoint Server Publishing Infrastructure is already activated.

Answer 1

If you need Publishing, use a classic Publishing site or classic Team site with Publishing enabled.

https://support.office.com/en-us/article/Enable-publishing-features-479677A6-8B33-4AC7-907D-071C1C7E4518