You will need to remove the plastic door cover from inside to see what's failed inside the door. Remove the cover of the door handle, you will see 2 screws, remove them. Pry off the A cover (inside part that covers the side mirror bolts). Then start prying off tabs that hold the plastic door cover. Use trim removal tool, if you have. You may break some of those tabs, so you may want to go to the dealer and buy some of those tabs.