Why has my order total changed after payment in my new online store?

[primepixie]

Hi, I opened a store on shopify a few days ago, then to check if everything was ready, I placed an order for a product in my store, filled in the details and payment details, but after the payment was made, I encountered the problem : "Your payment couldn’t be processed because your order total has changed. Check your order total and try again" . and even though the payment was paid, I was not given the option to continue the order

[jovantperic]

I am experiencing the same problem. It just started a few days ago. The only thing I did since it was working properly was I added a Shopify Bundle App. Since this app doesn't work properly, I removed it but it didn't fix the initial problem. 

[SelfC]

I have the same issue.