Steps to reproduce:

1. A user in Users groups logs in and goes to https://www.wikifunctions.org/view/en/Z10184.
2. The user can successfully run the function
3. The user goes to the implementation of that function - https://www.wikifunctions.org/view/en/Z10186.
4. The user clicks Run function on the implementation page will get: wikilambda-zerror

Notes

• Wikifunctions staff users can run the above implementation (https://www.wikifunctions.org/view/en/Z10186) successfully
• wikilambda-zerrordisplayed for Users when any Implementation is run
• Tests can be run by Users successfully
• if implementations of functions cannot be run by Users (and some other user categories), users should not see an active Run function button or should get a more helpful error message.