having this error when purchasing via paypal checkout:
There was a problem connecting to PayPal to setup your purchase. Please try again.
10002 - Security error - Security header is not valid
(filled in api signature correctly)
what went wrong?
thx 4 ur support!
PS. asked this question also here: https://premium.wpmudev.org/forums/topic/upload-file-for-downloadable-products-not-working#post-266224