ibooks error when publishing to epub

I use the standard epub ebook compile settings and receive the following error:

“This page contains the following errors:

error on line 42 at column 33: PCDATA invalid Char value 5
Below is a rendering of the page up to the first error.”

Excerpt From: Marc Brule. “Pastoral Burnout.” Apple Books.

It occurs in the front matter (Acknowledgments) right at a line break. I’ve looked at hidden codes and tried adding and removing characters to no avail. Any ideas what may be causing this error?

Here is the actual text and an asterisk where the error occurs:

“To my children, Amy, Jonathan, and Adam who didn’t always know how to respond or behave around me during my lowest points, thank you! I knew your hearts were filled with love and care for me.*
To my wife, Wendy, thank you for not giving up. You responded in ways beyond my expectation, which alleviated my apprehension.”