Solved.
My developer determined It was the PHP handler configuration in Nginx.
The section beginning here https://gist.github.com/williejackson/8b31717086d88ecb2d74#file-gistfile1-txt-L32 replaces the section beginning at line 41.
My developer determined It was the PHP handler configuration in Nginx.
The section beginning here https://gist.github.com/williejackson/8b31717086d88ecb2d74#file-gistfile1-txt-L32 replaces the section beginning at line 41.