I have been using the Advanced Cash On Delivery app for India since 2016 and had to deactivate it temporarily since March 2020. Tried activating it in the month of May and started getting the below errors:
1) Cash on delivery has not been activated.
2) When trying to make a cod payment at the payments page we get an error message but that's a Heroku Application error message.
I have been desperately chasing Shopify support to help me with this issue as it's causing us huge losses but no one has even bothered to look into it properly. Can someone help me here?