How to fix an error code -994 on Facebook on iPhone?

So my friend, found out that his iPhone has come up with a code that won't let him use Facebook and I was wondering how to fix it? He's in a different state and traveling back and wants me to figure it out for him before he gets back on the road today. I've looked all over, and nothing's helping. I would appreciate it if I got an answer. I've told him to delete the app and re install it and re login or remake his password. But I don't think its going to work.

If None of That Works Then Your Not Gonna Be Able to Fix It As That Would Then Be a Problem On Facebook's End They Would Have to Fix it

Please Have Your Friend Contact Facebook At The Help Center and Report the Problem To Them

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