I made this yesterday. I made 1.5 times the recipe for a larger loaf pan and used apple butter (no sugar, just reduced apple) instead of yogurt or coconut butter. I had the same issue with the center being uncooked. Lesson learned that it needs to stay in longer but the pieces we cut off from around the center were very good. I was very impressed with this recipe. Thank you!
Ugh! It’s been an hour and it doesn’t look like my bread has hardly risen at all. I haven’t made any substitutions, my yeast was good, etc. I currently live in Italy, so it’s plenty warm here today. I’ve now warmed my oven up a bit, turned it off, and have the dough in there to see if I can get any kind of rise out of it before trying to cook. Fingers crossed!

Thanks for the reply Adriana. What I meant by a quick mix in the Vitamix was that I “Vitamixed” it one more time to be positive it was as fine as could be. I keep almonds frozen and I use them up over time to make milk, then dehydrate the pulp and then turn it into flour. I will have to think about buying the flour already made again…seems like I’d be going backwards in my slow but steady journey of making the most of my whole ingredients. I wonder if blanched flour would work better…I’ve read that the the only difference with the skins is the little brown specks that don’t bother me. I may try again at some point.
Some randomized controlled trials have shown the Paleo diet to produce greater short-term benefits than diets based on national nutrition guidelines, including greater weight loss, reduced waist circumference, decreased blood pressure, increased insulin sensitivity, and improved cholesterol. However these studies were of short duration (6 months or less) with a small number of participants (less than 40). [4-6] https://www.youtube.com/watch?v=aFIHLe_rLbc