We have authorize.net set up to accept payments, and that's working
great. Now I want to add in a simply "get subscription details" request,
but whatever I do I'm getting this error: E00003 The element
'ARBGetSubscriptionListRequest' in namespace
I found the problem, it was actually caused by providing incorrect login
details. The $processorKey1 and $processorKey2 values were wrong. I
don't know why it then gave this strange missing clientId message, but
correcting those fixed it and it's now...