Hi Benjamin, thanks for getting in touch. That’s a weird error! Since you’re using the Pro Plugin please open a Support ticket so we can look at this together.
It’s 1:30pm here and I’ll be keeping an eye on support till 4:30pm (Hamburg, DE time).
(You can’t upload attachments on this forum so the Support page is best for this type of question so that I can reproduce this issue with you) 🙂