Reply To: The price calculating function doesn't work on the form and dashboard

That’s really weird. Seems like your theme or one of your plugins is adding these line twice on each request:

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["date","Not available at 08.06.2013"]

That’s why it can’t read the answer and stucks. You’ll need to deactivate theme and plugins after another till it works. Then you can search for that line in it and we may be able to fix it.
Regards