M1 will not attach

My M1 will not attach / lock onto my fence. It did not attach to the stock fence, so I purchased the fence adapter after finding out my Bosch saw isn’t compatible, and it won’t attach / lock to the adapter fence either. I did make sure I was not touching the release mechanism when trying to attach. Anyone else have this issue? Did I get a defective unit?

Hello, do you mind taking a video of you trying to attach it? It is usually due to the force/touching the release button so seeing a video would be helpful when trying to assist!