Charts not generated after exercise is finished

[b282022]

@manki11 @llaske
I recently cloned the repository and deployed locally by doing npm run start (not inside the Sugarizer) and when I completed an exercise, instead of getting the charts in results, I got the following error.

I am not sure but if it falls in the category of bug, I would like to work on it.

[manki11]

The full version of exerciser activity only runs inside the Sugarizer shell (recommended), as it is using a lot of API functionality (user details, presence etc) of Sugarizer. This error is occurring because there is no "current_user" in line 102, as that object is fetched from Sugarizer.