For security purposes, invite links have a time limit that is clearly stated in your invite email. The easiest thing is to complete your sign up within that window so you have continued access to the applicable private Partner Management Platform.
If you missed your window, go to the private Partner Management Platform you were invited to and use your email address to trigger a password reset. This will send you a new link that you can use to set your password and finish setting up your user profile.
Important: Make sure to always click on the most recent link if you accidentally reset your password multiple times. Only the most recent link will work.
Related articles:
- Can I change a user profile email address?
- How do I reset my password for the private Partner Management Platform?
- How Do I Use Multi-Factor Authentication?