Facebook log-in is broken

Hey

Today facebook log-in on our web-site stopped working:

28.03.2017 10:54:52.313 *ERROR* [qtp1448280031-74010] com.adobe.granite.auth.oauth.impl.oauth2.Oauth2Helper Response body is incorrect. Can't extract a token from this: '{"access_token":"EAAJGDvtJEUYBANHEc5fdkYXLtAgDV6YHLcZCU87Rf7EPbTZAH05LqtAs1yZBXC3uLPDvpUpPMZCYEWLZCOdIksfObQ8Eu2gVibrZC1yr2lDvE5GeWt72S2Idsss7IbrhEIBNImkL78JAk82RpyMRCz5WdDMiDO2t8dPQdtINowNgZDZD","token_type":"bearer","expires_in":5112541}' org.scribe.exceptions.OAuthException: Response body is incorrect. Can't extract a token from this: '{"access_token":"EAAJGDvtJEUYBANHEc5fdkYXLtAgDV6YHLcZCU87Rf7EPbTZAH05LqtAs1yZBXC3uLPDvpUpPMZCYEWLZCOdIksfObQ8Eu2gVibrZC1yr2lDvE5GeWt72S2Idsss7IbrhEIBNImkL78JAk82RpyMRCz5WdDMiDO2t8dPQdtINowNgZDZD","token_type":"bearer","expires_in":5112541}' at org.scribe.extractors.TokenExtractor20Impl.extract(TokenExtractor20Impl.java:33) at org.scribe.oauth.OAuth20ServiceImpl.getAccessToken(OAuth20ServiceImpl.java:37) at com.adobe.granite.auth.oauth.impl.oauth2.Oauth2Helper.requestAccessCode(Oauth2Helper.java:124) at com.adobe.granite.auth.oauth.impl.OAuthAuthenticationHandler.extractCredentials(OAuthAuthenticationHandler.java:193) at org.apache.sling.auth.core.impl.AuthenticationHandlerHolder.doExtractCredentials(AuthenticationHandlerHolder.java:75) at org.apache.sling.auth.core.impl.AbstractAuthenticationHandlerHolder.extractCredentials(AbstractAuthenticationHandlerHolder.java:60) at org.apache.sling.auth.core.impl.SlingAuthenticator.getAuthenticationInfo(SlingAuthenticator.java:718) at org.apache.sling.auth.core.impl.SlingAuthenticator.doHandleSecurity(SlingAuthenticator.java:466) at org.apache.sling.auth.core.impl.SlingAuthenticator.handleSecurity(SlingAuthenticator.java:451) at org.apache.sling.engine.impl.SlingHttpContext.handleSecurity(SlingHttpContext.java:121) at org.apache.felix.http.base.internal.service.ServletContextImpl.handleSecurity(ServletContextImpl.java:421) at org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:57) at org.apache.felix.http.base.internal.dispatch.Dispatcher.dispatch(Dispatcher.java:124) at org.apache.felix.http.base.internal.DispatcherServlet.service(DispatcherServlet.java:61) at javax.servlet.http.HttpServlet.service(HttpServlet.java:725) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:499) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745)