python Input() function in jupyter notebook not working

Question

I've been running a script on jupyter notebook:

num=input("Enter a number: ")
print(num)

When i run this cell, nothing is printing in output cell, no text box is appearing. It simply passes on to new cell. Initially when I ran it for the first time, the notebook gave "'_xsrf' argument missing from post" error which i resolved by opening another notebook as referred in Jupyter Notebook not saving: '_xsrf' argument missing from post. The autosave problem was resolved but it still ain't printing anything. My python version is 3.9.7.