@insightskillz You need to re-install Anaconda, and need to install fresh environment. Can you please tell me on last question, at the time creating conda environment did you separately install ujson and tensor flow? @insightskillz What is your current VS code Version and Python Version?
@insightskillz Try this also
conda install -c anaconda ujson
Or
pip install ujson==1.35
Or Ref this link:
Good Luck!
@insightskillz Your error gone? 
?