Hello
@binaya ,
Upon investigation on our end, we have identified that the error you are encountering is due to the absence of a country code in the phone number field. To ensure proper functionality with Billplz, it is mandatory to include a country code in the phone number. Please enter the country code along with the phone number to resolve this issue and enable proper functioning. If you require any further assistance, please don't hesitate to reach out.
Also, we have updated the error message that you were previously receiving. so that, users can enter the country code along with the mobile number accordingly.