If you are clicking a link in a Pushpage and it is not viewable and you get a page not found error.

First Check the Pushpage issue link/url itself to see if the URL is Public facing

Then check the link and see if it has something like long and has the word push in it
Log.aspx?s=609&snd=1cfcc36b-abc6-45fb-819b-053263ab2d1d&url=http%3a%2f%2%2fpodium%2fpush%2fLog.aspx%3fs%3d609%26amp%3bsnd%3d9997e0dd-2dc7-4e6e-84b9-5ffc83be6fed%26amp%3burl%3dhttp%253a%252f%252f%252fftpimages%252f609%252fdownload%252fdownload_1291818.pdf%26amp%3blbl%3d%2526nbsp%253bMay%2bmenu%2bfor%2bLower%2bSchool&lbl=%26nbsp%3bMay

If so this more than likely means you copied the link from a pushpage issue. Sometimes copying the link directly from a pushpage and not the original source can create a link to go a page not found error. Find the original link/URL and update that in the pushpage issue.