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I got 4 updates on email that "We're still working on your application " and one with "We updated your application status " on my PR application but cant open cic website.. it redirects me to main page
 
Seems, they have sent email to everyone whose applications is in progress. I got them too
 
I saw some in another thread saying they briefly saw it said 'Application Updated' before they hit a 502.

Is that good news?