Hi all,
I have a friend, which is running and old Magento 1 installation. I have tried to help him get rid of this error in checkout, but not able to find a solution for this.
Please see the video, which shows the error:
https://watch.screencastify.com/v/DfrpvxgdC3h8p9ZqWemf
When customer goes to checkout, and fills out all the fields, and then gets to phonenumber, the shop starts to validate a checkout method, and the customer is not able to fill out phonenumber correctly, without closing the error popup, resume, and fill out, and close, resume.
Magento 1.8.1.0
Ultimo theme: 1.6.1
Checkout IWD OPC: 3.0.7
Hope anyone can help me, and point me in the right direction 