TOPIC: 500 Error in frontend when adding or editing payment options

Hi all,
When adding, deleting or editing the payment options for an event in frontend event management I get error 500:

Layout "add_paybox" not found. Seems that some code is missing here.

I use latest version of DT-Register. If s.o. could confirm this possible bug, i would be happy; else i'll make a ticket of it.

Best Regards,
Stefan