I installed joomshopping PayPal API. When testing I get the following error:
"SetExpressCheckout failed: Array ( [TIMESTAMP] => 2016-10-19T12:37:55Z [CORRELATIONID] => 32dbdf119af31 [ACK] => Failure [VERSION] => 117.0 [BUILD] => 26106709 [L_ERRORCODE0] => 10002 [L_SHORTMESSAGE0] => Security error [L_LONGMESSAGE0] => Security header is not valid [L_SEVERITYCODE0] => Error )"
Joomla: Joomla! 3.6.2 Stable
JoomShopping: 4.13.0
PHP: 5.6
MySQL: MySQL5.5
JoomShopping: 4.13.0
PHP: 5.6
MySQL: MySQL5.5
Last change: 19.10.2016 19:47