7.7.9: Is there a way to reset the Problems Panel?

Is there a way to reset the problem panel? After I fixed all of the issues in my projects when it was first introduced it will no longer find any errors and warnings even if I purposely create an error.

No matter how many errors I create and no matter how many times I scan it it no longer finds errors or warnings.

I love the problems panel. It taught me so much. Wish it was working for me.