I am getting this error as well but I cannot open the includes\modules\payment\paypaldp.php
I am getting this error as well but I cannot open the includes\modules\payment\paypaldp.php
I have had my cart up and working for over a month, now this. Have applied the code && isset($response['TOKEN'])). Will see if it works.
Just had the 10413 problem on my site and spent 6 hours figuring it out. If Sub-total in Modules>Order Total is disabled it gave me the error, but once I turned it back on it now works fine.
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