wallpaper/screensaver issues

Ever since downloading OS Catalina, neither my dynamic wallpapers or screensavers work. I was using third party ones that I really enjoyed, but I switched to the standard apple ones, and they don't work either. The dynamic wallpaper doesn't change to the time and the same image remains unchanged on the screen all day. In addition, I have my screensaver set up in a hot corner, but every time I put my mouse in the corner, my screen does one of two things; it either does some static type thing for a split second before showing the screensaver, or it goes completely dark and nothing happens.