At which URL did you encounter the problem?

http://dev.finto.fi/juho/en/groups

What steps will reproduce the problem?

1. Go to URL above
2. Click any group in the Groups section
3. See Developer Tools -> Console output

What is the expected output? What do you see instead?

I expect no errors to be raised. Instead, I get the following JS error:
TypeError: $(...)[0] is undefined scripts.js:414:8

It seems like there is an unhandled exception happening at

that causes the mapping properties to be unable to load.