Structured Data Errors: Missing Author, Updated, Fn

Hello all,
I’ve been using Make for a few years now. Recently I started noticing Structured Data Errors in Google Search Console. Specifically, missing author, updated, and fn (author, and updated more frequently).

I’ve searched high and low trying to find a fix for this. I’ve even searched this forum, and saw that someone posted a similar concern. But there doesn’t appear to have been a response or a resolution to this issue. Can someone please help me?

Thanks in advance.

The page I need help with: [log in to see the link]