In the 20.05 manual there is a broken image. Instead of an image |image1501| displays. The problem doesn't exist in the 20.11 manual. It could be the image file missing or there being a wrong mapping in the images file for the number and filename. See: https://koha-community.org/manual/20.05/en/html/patrons.html
Are you still working on this Eden?
Still an issue for 19.11 and 20.05 versions of the manual.
It appears to be fixed from 21.05 upwards: https://koha-community.org/manual/21.05/en/html/patrons.html