Illegal Form submission:

This happens when the form URL is different from what is declared in the ABVFP control panel as form URL. Sometimes you might have it declared in the ABVFP cp with the fulll www. whilst in your menus you have it without the www. or vice versa, or a simple typing mistake.

As you already read, the file ndadmin was part of the OLD version, it doesn't exist in the new one, so don't look for it. The comment you found about running ndadmin, is, i suppose, also very old (more than one year ago)

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