If you are given access to WPA results, visit the HST site (http://hst.stanford.edu) and click on the Tasks tab to find links to your tests.
If you encounter an error viewing the responses, you may need to clear your browsing data. Just clearing files and images is usually sufficient. One way to do this is to do what is known as a hard refresh of your browser. On Chrome, this is (Win) Ctrl-Reload or (Mac) Shift-Reload. See details at https://wiki.scratch.mit.edu/wiki/Help:Hard_Refresh. If you have trouble, please consult the Help menu in your browser's settings.