Well, a little embarrassing, but I had the wrong Ad Account connected to Shopify. Once I disconnected it and connected the correct Ad Account, I was able to connect the Business Manager. Thanks again for your help.
This is an accepted solution.
It happens. Glad it worked out for you. Good luck with your FB ad campaign. One thing you might want to experiment with is running ads through FB ads manager as well. You have a little more control over audience targeting.
I am having the same issue. I spoke to Shopify via live chat. They told me that it is out of there hands because I have a red flag up on my business manager account because I changed my business name and wanted to change it with my business manager as well. Now I cannot create or add a new ad account. The person at Shopify told me to get a hold of facebook, that they have some live chat support or something. The don't. i can't get a hold of them. I made my first sell the other day, but now I'm losing people views and sessions through my store because I can't create campaigns with my facebook ads account via Shopify store. What a barrier.
Hi just sharing a way I got past the business manager selection > choose page (page connect failed) bit. First of all, I started with Instagram when adding the sales channel (not sure if that helped or not, but try it) BUTTTT
I think the most important part was at some random point I had begun creating a "commerce account" for my facebook page - got to business manager, commerce, and it redicrects you to a whole new system outside of business manager. Delete any in-progress commerce accounts that may have been associated with your page, and when you try to re-add the sales channel on shopify, it doesn't give you the page connect error.
Just my two cents, hope it helps someone.