I have a 1.2 second clip that I am trying to remove the background of and when I upload it on the web app on my laptop (Mac OS 10.15.7, Firefox 123.0 [64-bit]) the Remove Background feature is greyed out. I have tried re-uploading it to no avail. I have tried waiting a few minutes to see if it just needed more time to process to no avail. I closed the project, exited the app, and re-opened the project, but a loading circle appears in the upper right hand project window and remains circling indefinitely. I tried signing in and re-uploading the video on a different browser (Chrome 121.0.6167.139 (Official Build) (x86_64)) and the exact same thing happened. I pay for this service so it is not blocked b a paywall. Please advise.