I'm on the same boat.
I got the approval letter on December 30th and created a portal, uploaded my info and photo on the same day.
It's been 2 weeks and no eCoPR.
I have sent emails to the portal email address two times but no answer.
Don't know what else I could do either.
Finally got my eCoPR today!!
AOR: June 2, 2021
Portal credential: December 30, 2021
eCoPR: January 14, 2022
According to my GCMS note, my application was approved in the end of July but no news from them for 4 months.
I emailed to IRCC Portal and Ottawa visa office to request for the portal credential email in the end of the year and finally they moved.
They again stopped moving after the portal creation, I sent two emails to only IRCC Portal but nothing for two weeks.
This morning I emailed including the Ottawa visa office again, then few hours later I got eCoPR.
All this time I had to push so much for them to move. (emailing to different offices)
But it worked at least for me.
It has been an absolute nightmare but I'm glad I could finally share with you all my experience.
I hope this will help someone.
Cheers,