After installing the PayPal commerce platform and trying to hook it into my paypal account, I ALWAYS get the message:
Authentication failed due to invalid authentication credentials or a missing Authorization header.
Live or Sandbox mode makes no difference...
Does anyone have any ideas what causes this and how it can be cured as I have no other way to take payments!!
The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.
Programmer / Opencart Tester
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