Lesson 13 error

[AndreaFerraresi]

If you are asking a question rather than filing a bug, try one of these instead:

• StackOverflow (http://stackoverflow.com/questions/tagged/ami.js)
• FNNDSC #AMI Slack Channel (https://slack.babymri.org)

Description

No image shown in image13 after loading

Steps to Reproduce

Just click on lesson 13 in the live demo, no image shown

Browsers Affected

Have tested it only on firefox

• All
• Chrome
• Firefox
• Edge
• Safari 9
• Safari 8
• IE 11