I have written a few rules for this panel---and basically it
HIDES when classes that do not require the attachment are NOT selected.
I would like for the attachment to be REQUIRED when the class
that requires the attachment is selected.
Here is my form and a few things that I have tried:
With these current settings—the form is still allowed to
save even if no attachment is given.
I would like an error message to stop users from registering
without an attachment.
Can you please help with this?