Hi Regdor,
Maybe CIC just forgot to update their system.

Your friend can call CIC and talk to an agent directly bypassing the "enter your Client ID portion" or he can go back to his courier and ask them. Im sure your friend sent it with tracking numbers.
CIC will look at the date on when the application was sent. One must have an official receipt to have proof.
Good luck

@ plussy
thank you so much. my friend was so worried because his WP has expired last Oct5, and if date considered is the receipt by CPC, then he could have been out of status and should apply restoration. Thanks that the reference date is the date when it is mailed. God bless...