Regarding to my previous topic, @sam asked me to to create a new topic to this issue:
##That’s how it looks like:
##What else:
Thanks again for all of you’re hard work at Discourse
This is because the German translation is not updated in Transifex. It still had email in translated string instead of emailOrUsername. I just updated the German translation in Transifex to fix this error:
email
emailOrUsername
https://www.transifex.com/projects/p/discourse-org/viewstrings/#de/clientenyml/45101861?key=success_email
It will be fixed in next translation update.
Great @techAPJ! Thank you.