What kind of the error do you see now? Is this similar to SSK1993's (I quoted the comment below)
Or, do you see one or more of followings? : the service took too long to respond, connection timed out, HTTP error 504, connection refused, network changed
Have you tried to contact IRCC via webform? If not, please try.
And if you can't access the webform with the same error, your network security might no longer eligible to access certine IRCC servers. It could happen if you use an old router etc....
