Seems this one behind it
Check your application status
Please note that some citizenship applicants are currently experiencing technical difficulties with our e-Client Application Status online tool. We are working to resolve the issue as quickly as possible. In the meantime, you may refer to the processing times web page for an estimate of how long it may take to process your application. Thank you for your patience.
Some CIC clients may check the status of their immigration and/or citizenship application(s) online, 24 hours a day, 7 days a week; anytime, anywhere.
All other clients can use processing times as a guide to determine how long it can take to process their application.
Answer the following questions to determine which tools are available to you.
What did you apply for?