EDIT: LOL. The link that you gave me just showed HOW TO EDIT videos on Google Photos, like how to use the buttons there, but DIDN'T really have any answer or solution to the problem, which is the STABILIZER not saving on editing videos. The stabilizer in editing videos is not saving or not working anymore (always say "unable to save changes"). The first time I used it was way back 2020, then after the updates, it's not working anymore.