Why can't I get to the log in screen on my Lumia 640 phone?

[Windows Central Question]

can get to log in screen on Lumia 640 phone

face book is installed but when you click on app it flashes up the log in screen then goes back to app page

 

[MaryJane197]

Re: can get to log in screen on Lumia 640 phone

I had this issue. I had to delete and re install it and re start the phone several times to get the app working. I eventually installed facebook beta. It works better for me.