Dear Bojan
Thanks for your advice.
Sorry for late reply, because I’ve been busy lately.
I tried the new plugin, and this time worked fine!!
Thanks a lot!!
Regards
Dear Bojan
Thanks for your reply.
The plugin version is 1.2.5.2, and the version of WP is 4.1.1.
I also deactivated all plugins and themes except for coursepress.
Still got the same message.
Seems there is no conflict…
Regards
PS. ANYONE option worked fine, thanks!