Hi Erwin and Anthony, thanks so much!
As a final troubleshooting: Erwin, would you be willing to share the .qsf file behind https://eu.qualtrics.com/SE/?SID=SV_8Hq0v4NUr6t7ce9&Preview=Survey ?
Even just simply copying and pasting the text from the .qsf file would do! Then I could copy that text into a .txt file, but with the .qsf extension, and upload it to Qualtrics on my end. That seems like it would have to perfectly reproduce what you’ve done on your end. Let me know!