Not sure what’s causing this but we have same problem and looks to be similar, Woo making ajax request for http when it should be requesting https. Someone else said go back to earlier version of Woo to fix.
We’ve got the same problem when using Square and Stripe. Looks like bad Ajax calls by Woocommerce to http instead of https. We can’t figure out how or where those are being generated. If someone has a clue (Woo does not), we need help.
