Crank window - mechanism failure
Thanks for reaching out! This window operator has become stripped, so you'll need to replace the entire assembly. Unfortunately, this type of damage is irreparable.
I'm happy to recommend a replacement for it but I'll need to see its arm(s) and how the operator attaches to the bottom of the swinging window sash.
Please feel free to reach out with any other questions you might have.
Thanks for the photos. I believe you'll need the 39-031 EntryGard Dual Arm Operator to replace your hardware. Take a look over the dimensions below and compare them to confirm that this is the correct match.
The compatible covers, handles, and tracks can be found tagged below along with the opposite version of this operator.