I cant Login Facebook

When I trying to login in my account, it will send message :
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"Sorry, this feature isn't available right now
An error occurred while processing this request. Please try again later."
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after that i refresh my tab, and it's back to login page
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I trying to change my password, my password changed. but still can't login
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then I check my account profile with other account, it's still available.
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• i can't access some of game too like pubg mobile (facebook login) or a some application who access my facebook account.

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thx.