Description / Beschreibung

When trying to copy an attribute the page stays blank.
JS Error:

TypeError: n.errors is undefined

The other elements are also affected.
Can not reproduce it in local dev setup.

Expected behaviour / Erwartetes Verhalten

Attribute is copied

Steps to reproduce / Schritte zum Reproduzieren

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Context / Kontext

2.3.0

References / Verweise