In case of minor issues, the door handles can be repaired. You can use the set screws on the door handle and then set the handle-free. Once you check all through the screws that connect these, you can reassemble the door handle to tighten the screws. You can also reinstall any covers and test to make certain that the same actuates the latch properly.
If you cannot immediately see the underlying issue, then the best idea info removes these immediately. With such an exposed screw, you can remove the handle completely. Using an Allen key or screwdriver, you can accomplish the task.