You are not the only one. I've used other browsers on my android to use facebook over m.facebook.com, but about a week ago Facebook Messenger messages was disabled with an error message and also the alternative mbasic.facebook.com was crippled for me. So anyone messaging me have to wait until I'm at home. Their ordinary web experience since the latest(?) change of UI is horrible, notifications takes forever to render forcing a full page refresh to get back working.

https://mbasic.facebook.com/messages/ works for me in Chrome on Android 11. If it stops working i am done with FB messaging forever.

Thx for data point. Android 11, Chrome 87, "content not found" for me at the same URL.

I'm connecting from France, I'm wondering if it's maybe EU-only thing related to FB's latest rollout of "we disable some stuff for EU users to be GDPR compliant"...

I have been using mbasic on iOS for a long time, I will never install the app. Unfortunately it stopped working about a week ago for me too.

There's Messenger Lite, I think meant for low internet connection speeds and free of a lot of bloat. Hopefully the antitrust lawsuit will keep Zuck from getting too egregious and getting rid of that too, but who knows.

mbasic not working here either. I suspect it's connected to the "Some features are not available" shown on the desktop-browser messages UI. Something to do with complying with European legislation.

We all saw this coming, even my fairly normal friends tell each other to leave facebook at this point though so thankfully I'm not impacted.

Same happens to me too

mbasic.facebook.com still works perfectly fine for me.

The website continues to work, but when you go to "Messages" tab, it shows an error.

Not for me? Seems to work as per normal in my case. I can't tell you exactly why that is though.

Are you based in EU or outside? Perhaps it's an EU-only bug/feature after latest changes to be compliant with EU privacy rules.

I'm currently based outside the EU and US, perhaps it is as you say. I'm not entirely sure why the privacy rules would change so drastically on a HTML based page though...