Hi guys. Upgraded from an iPhone 6+ to a 7+. Restored from backup. Then paired AW (Series 0, which I already had) to the new phone. For whatever reason, I can't get more than 1 credit card into Apple Pay on the Watch. The other cards appear in the Watch App, with an Add button next to them. But when I click the button, I get a spinner that eventually turns back into the Add button. Any help much appreciated.