It seems that you are not the only one experiencing issues with Facebook. Several users have reported problems with the Facebook app, whether it's the regular version or the Lite version. Some users have mentioned that they are unable to access Facebook via the web as well. It appears to be a widespread issue affecting multiple users. It's best to wait for Facebook to resolve the problem on their end. In the meantime, you can try accessing Facebook through a different device or network to see if that helps.
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