On 10 October, at 02:40 GMT, an outage at one of our infrastructure providers caused a site-wide outage at Overleaf, which lasted for approximately 40 minutes. During this time, most users were not able to access their projects on Overleaf.
When the provider recovered, Overleaf came back online. However, during this restart, a component of one of our services did not restart correctly. Unfortunately, this led to an incident affecting access control, as summarized in this post mortem.