I was able to turn off the author in the settings, but that also has a problem. When you turn off the author…it still says “By”, but no name shows up. You may want the developers to look at this as well. as I believe turning off the author should remove the “By” as well.
I have notified this also to the theme developer.
Since I already have a child theme, I am not sure how to combine two child files.
I will look it up, unless you wish to provide instruction.
From the shared child theme just copy the whole inc directory including inside its files and folders in to your child theme directory and if the inc directory already exists in your child theme then just copy the missing files and folder in it.