There was a technical issue and we couldn't apply the coupon. Please try again

Question:
I am receiving this error when customers check out using a newly created coupon “There was a technical issue and we couldn’t apply the coupon. Please try again.”

Product:
Wix Payments

What are you trying to achieve:
I am trying to make sales.

What have you already tried:
I have tried it on many different computers and same result.

Additional information:
No other information.