Steps to replicate the issue:
What happens?:
This error is thrown:
Unspecified error (error information: "cannot read property 'Z1K1' of undefined")
What should have happened instead?:
The function should have been executed successfully.
Other information (browser name/version, screenshots, etc.):
The error was introduced with this edit: https://www.wikifunctions.org/w/index.php?title=Z33244&diff=268395&oldid=268375.
