I am currently running After Effects CC v220.127.116.11 and am trying to track a mask to background footage using a video I found here. Around 2:48 in the video, they right-click Mask 1 and the "Track Mask" option appears, but it doesn't appear for me here.
Am I doing something wrong or was there a change recently? Thanks.
As further information, I am tracking a facemask to replace another person's face.
Your layer is a still image, so there is nothing to track. tracking is applied to the video, not the layer being attached.
If you are trying to replace a face, you have to do it a different way.
Try this tutorial: Face replacement with mocha from David Torno | Creative Cloud blog by Adobe
Or, if you don't want to have to mess with Mocha, just use AE's point tracker, apply that tracking data to a null object, and then parent your new face to the null.
You can learn more about motion tracking in After Effects here: Tracking and stabilization motion workflows in After Effects