I am trying to use Sandbox, which has worked in the recent past, but now I receive this error when attempting to use Sandbox: "Things don't appear to be working at the moment. Return to Merchant." I recently began using LearnDash (learning mgmt software) In LearnDash, when I select "Use PayPal Sandbox", I receive the error. In LearnDash, when I deselect "Use PayPal Sandbox", I do not receive the error. LearnDash support says everything's working on their end. PayPal "message" support does not seem to be a live person, offering emphathetic platitudes and seemingly irrelevant suggestions. I probably have something set wrong, but I cannot figure it out. Please help.
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