How can i delete the author box at blog post page?

Hello,

You can remove the Single Post Author Box using Edit with tagDiv Composer with a right-click you can delete => https://i.imgur.com/BnhhxVh.png , or selecting the element and with drag & drop place into the deleting red zone from the bottom right of the page => https://i.imgur.com/vkQVCjn.jpg the same for date. or if you have standard template
to hide the author box, you can use this custom code CSS -> https://i.imgur.com/ooeu4hq.png
#author-bio-box {
display: none;
}

This code needs to be set in Theme Panel -> Custom Code -> Custom CSS.

Thank you!