I opened a case yesterday for this issue. I'm also seeing the curl error 60 and "the certificate expired 5 days ago" if I go to the URL. Support doesn't seem to be on the same page. They're telling me it's my agent version.
Also have a support ticket opened regarding this. It looks like they did renew their cert (check the cert on the meraki dashboard https://n342.meraki.com/), but whatever system is hosting cf.meraki.com hasn't been updated with the new cert... this should be a very easy fix to apply the new cert - and considering its unusable right now I would think would be a priority, but I put the case in yesterday morning and still nothing.