myztx Posted July 9, 2016 Share Posted July 9, 2016 Hello Now I have tried with all solutions I've manged to find. I just can't get it to work. I have changed to sandbox and back again. Copy pasted via texteditor to be sure about no hidden chars. The only respons I get is: Error occurred: Please try to contact the merchant: <b>PayPal response:</b> TIMESTAMP -> 2016-07-09T12:56:12Z L_ERRORCODE0 -> 10002 L_SHORTMESSAGE0 -> Security error L_LONGMESSAGE0 -> Security header is not valid L_SEVERITYCODE0 -> Error Any ideas before I hurt my self?! Cheers Daniel Link to comment Share on other sites More sharing options...
bellini13 Posted July 9, 2016 Share Posted July 9, 2016 The API credentials you entered are wrong. I can't see what you entered (and I don't want), but you need to verify this Link to comment Share on other sites More sharing options...
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