Assignment submission "IPython module error"

I face this error while I work in the same notebook and there is no Ipython module in my codes, I get this error every time. even I searched for IPython module, I got no results.
the error:
" There was a problem compiling the code from your notebook. Details:
No module named ‘IPython’ "

Please download the notebook check notebook metadata. If the graded cells are missing metadata, get a fresh copy of the assignment. If that doesn’t help, click my name and message your notebook as an attachment along with grader feedback.

The problem is solved, Thank you.