Incorrect loop used in `add_interactions` function

I’m not sure what to do with this issue. Has anyone else had this problem in the grader? Passes the notebook unit test and also passes the auto grader test:
Code Cell UNQ_C4: Function 'add_interactions' is correct.
Thanks in advance!

For the mentors ( @Mubsi ) Here is my lab id: fklzhsuf

The learner has been helped.