Not being able to do backspace (i.e. no editing) while doing assignment in a particular cell on Jupyter

This is happening while doing Programming Assignment: Python Basics with Numpy
. What should I do to make it work?


I have moved this post to the DLS Course 1 category as other learners taking the same course might benefit from this. Also, it might be a one off case so do try re-login from incognito or other browser and see if the problem persists or goes away. Make sure to ad more information about which cell this is happening as well.

Make sure if you have any course-specific doubts, explore the specialization category and post in the relevant course subcategory as course-specific mentors are actively answering the queries there and the threads in the general discussion might not come on their radar and remain unanswered at times.