Hi,
Hope you have unchecked the Password policy in Site administration ->Security ->Site policies
When the web service tries to create a User account in moodle, might be the policy does not match.
Hello,
I had let it blank.
WP Version 4.8.3 and Moodle 3.2.2
Probably it could be a version issue.
I am sure you have the Custom Services(Site administration->Plugins->Web services->External services) and the required functions added . Particularly enrol_manual_enrol_users
Hello Guys,
The issue was solved.For me It was more of a configuration issue.
I had missed to set the product as Virtual and Downloadable. After i did this it works.
Hope this helps
Thanks,
Fidelis