Hi,
I am getting the same error on my site https://warehouse-19.com
The issue only happens when checkout form with credit card data is submitted.
On searching the above error message a bit, it seems that it’s either because of wrong credentials or wrong api end points.
I have checked and rechecked the credentials 10x times. Not sure about the api endpoint.
It will be nice if the plugin builts a log of error messages so that we can check it in detail.
Kindly help resolve the issue.
Thanks,
PS: My plugins are upto date. Error is only generated when payment is made through this plugin so I guess disabling or enabling it has nothing to do with the error.