Clearing cache did not work for me. I've added the license to all the correct folders and all that happens is the logo shows up in the beginning, then it goes to the load screen but immediately closes the app.
Ok, so best way to update is to download Google drive and open the file and click the dots on the top right and download it. It worked for me and installed the updates.
Try uninstalling Facebook and sign in through the app itself. It let's me sign in like that, and afterwards re-download Facebook aftet you're signed in.