Strange shifting problem

[mariocart75]

I was recently going to go to a Cars and Coffee event near me. I had a hard time putting the Fulvia in gear but finally went. I stopped at a red light, and when the light turned green, it would not go into any gear. I shut off the engine and I had absolutely no problem shifting, but when I turned the engine back on, it wouldn't shift. My Lancia guy told me to send him photos and videos of the clutch cable, which I have attached here.
We discussed the problem and most likely determined the cable itself is fine; other possibilities thrown out were the flywheel and pressure plate.

What do you much more knowledgeable Fulvia people feel might be the problem?

[mariocart75]

Trying to attach the short .mov files but was unsuccessful...how do I do that?

[racing]

How is your feeling if you push the clutch pedal.
Soft or with resistence

[racing]

I suspect that the clutch no longer separates. The shift fork of the release bearing is attached to the shaft with a screw.
Think that this screw is broken.
Had already found this once so.