Hello guys, hope some of you can answer this, cause i am quite stuck in there...

I want the little piece of metal from the black plastic bracket to bend whenever i screw in or out from the slot. I respectively named the 3 files to open : Open_this_one1  Open_this_One2, Open_this_One3

My problem is the follwing : I created a configuration which allows the little metal bracket to flex just about 45 degrees, but when i assembly that to the support, it just pop up a error message. What did i do wrong?

Thank you!!