My HP laptop is on W11 & never had a problem with avast updates until last Friday. My Facebook page will only load the top thread & a couple of the ‘suggested for you’; after that, there are just a couple of blank threads which flash on & off very quickly. If I go to any of my contact’s pages, they open normally so it appears just to be the main page with all feeds on.
I’ve cleared cookies/cache & restarted a few times but it makes no difference. Every other page opens as it should. Also, it opens normally on MS Edge or Chrome & these are the only ways I can get to Facebook now.