This might help:
First, go to
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/account.html
Scroll down and click on
Continue with GCKey
Sign in or Sign up and then Sign in with the Principal Applicants credentials (yours)
Click on
Add (link) your application to your account
Select Category: Temporary Residence
Sub Category: Work Permit and Extension
Select: UCI and Family Name
UCI: Fill in the Principal Applicant's UCI Number (yours - should be the same 8 digit number on your Visitor's Visa)
Family Name: Fill in the Principal Applicant's last name (yours)
Select: Passport (yours) and fill in the details
Select Work Permit Type: Open (initial application or extension)
Current Country of Residence: Canada (if you are Inland applicant; otherwise, your current country of residence)
Current Marital Status: Married or Common-law
Which Situation Applies to the Applicant: Applied for PR as a spouse or common-law partner in Canada.
