I cannot seem to remember the name of a door handle that is round knob on one side, and a lever on the other. Thanks.
If the key isn’t turning the cylinder, yeah have a locksmith Blume lunch you out some “original keys”. Not a copy of a copy of a copy.
If the key is turning the cylinder but that latch isn’t retracting try this.
Well you could grab a small pokey tool about the size of a pin head.
Take the key and turn it to the 3 O’clock position. Leave the key at that position, at the same time notice the little bitty hole either to the right or left and behind your knob. There’s a spring catch in there, depress it while pulling your knob off the spindle.
After that take a #2 flat head, a butter knife, some flat small strong something. Look through the “spindle” locate the rectangular cutout and attempt to manual engage the match by rotating they flat head to the 9 O’Clock position. If the match doesn’t retract well, it could be a bunch of things. Best of luck.