Coursepress certificates on bitnami AWS installation

Hi there,

Could you please let me know the prescribed solution for allowing certificate generation on a Bitnami Wordpress image on AWS installation?

When i try to generate certificates, i get this message:

TCPDF ERROR: Unable to create output file: wp-content/plugins/coursepress/includes/external/tcpdf/cache/carmento-1-302015100402257030.pdf