Open it from the inside! Then remove the inside panel and adjust the linkage. there is a spring clip holding the handle to the rod and if it slips, the handle won't work. My dealer wanted 100 bucks to replace the handle. just needed adjustment. And maybe something to keep it from slipping.
Had the same problem on a 96 Grand Voyager. As a temporary measure, I learned that if you turn the key just partially to the left (counter clock wise) and then pull up on the handle it will open. I'm sure this is just a temporary solution.