Profile: eun-kenL

Problem:
When editing a CRED form it is not possible to insert fields, the following error appears in the JS console:

/wp-admin/admin-ajax.php?action=cred_ajax_Forms&_do_=getPostFields
Failed to load resource: the server responded with a status of 500 (Internal Server Error)

In the PHP logs the error responsible was:

PHP Fatal error: Call to undefined function mb_convert_case()

Solution:
The standard mb_string PHP module needs to be activated on the server, consult host provider if required.

Relevant Documentation:
http://php.net/manual/en/function.mb-convert-case.php