Old Editor: "Could not finalize zip file. This is a server error."

[Trikes]

Hi there, I just wanted to create again an online QR code for an older experiment for which I did this sucessfully some months ago, but now I get the error message "Could not finalize zip file. This is a server error." Locally creating the zip file works. I tested with some other XML files as well, but each time the same error. Is creating QR codes with the old editor still possible now that the new one is there? Or maybe it is just a correct error message. Thanks and kind regards, Trikes.