Hello @bentanner,
I have faced the same problem and after lots of struggle I found following solution: –
1) On product page go to inventory Section.
2) There are 2 options there, see ” Manage stock?” Option is it checked?
3) If Not checked, Please check the option will show you two more option below.
4) Add in “Stock Qty” filed value more than 0
and Save it. I hope this will solve your issue.