Error because of Packstation Add On - please help

Error because of Packstation Add On - please help

Hello,

I installed the "Versand an Packstation" Add On - and know I always get an error message in the order mails I receive as copies. Please see attached picture.

What is to change to solve this error?

Thanks for your help in advance

Greetings
Ingo

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Aw: Error because of Packstation Add On - please help

1. Full empty order.
how did you do it?

2. Install
Versand an Paketstation 2.1.2 (JoomShopping 5.0.0+)

3. Disable display error in Joomla

warning need only for developer