This is because the certificate for rsi.hotmail.com, the server whence offline messages are retrieved, makes libpurple throw up a certificate warning thing which haze throws on the floor.
Workaround: ship the certificate as known-trusted in haze until I get a chance to fix libpurple and then deal with it properly.
Recent libpurples whitelist the rsi.hotmail.com cert, so this works again.
But the underlying problem is not fixed; retitling.
*** Bug 26704 has been marked as a duplicate of this bug. ***
*** Bug 17907 has been marked as a duplicate of this bug. ***
bug 23941 has more detail than this bug; duppin'
*** This bug has been marked as a duplicate of bug 23491 ***
on Feb 28, 2017 at 17:02:17.
(provided by the Example extension).