Hold the knob in one hand and insert the other end of the spindle into the square port inside the door lock.
Thru spindle too short on door handle.
Unscrew one handle and remove the spindle.
One knob is fixed permanently to the spindle by means of a grub screw through the neck of the knob.
I do this most days easiest way to do it is to insert follower bar thats the technical term for the spindle into the door handle and through the latch in the door ensure door handle is.
Try and use a big flat screw driver to open the door where the spindle use to go.
The one that screws into the larger flat.
Remove the rosette off of the spindle.
Once door is open remove old latch and replace.
Push on the handle until it fits against the corresponding trim plate at that side of.
Remove the set screw securing the doorknob to the spindle then unscrew the door knob off of the spindle.
Mount the handle near the end of the the spindle on the spindle opposite the one that contains the larger flat ie.
It seems the original had broken so it actually was too short to fit where it belonged.
It s nice being able to get through your door without too much trouble.
If that does not work try and use a thin scraper or similar to disengage the latch from the gap between door and frame.