Jupyter notebook not opening by using Anaconda Prompt

My jupyter notebook is still working until yesterday but today is was not working anymore. I unistalled and reinstalled Anaconda but the problem still exist. I show the problem in the following photo

This has been discussed several times recently. I think the comments here summarize things well, especially FlyingTeller’s in regards to your issue. There is mixing between two installations. Ideally because you want Anaconda, it should just be that.
Then in the future always report and include a traceback as full text code and not a screenshot. See here and where it mentions ** DO NOT post images of code, data, error messages, etc. in ’ How do I ask a good question?', which is referenced at the bottom of the former post on discourse.