wp-admin Lost Password Link Does Not Work if No Dashboard Page set

[brianhogg]

Reproduction Steps

1. Clear the Dashboard page setting under LifterLMS > Settings, Accounts tab
2. Log out and go to /wp-admin/ and click the Lost Password link

Expected Behavior

The Lost Password link works using default WP functionality

Actual Behavior

The Lost Password link is broken, since there is no Dashboard page set and it would normally be /<dashboard slug>/lost-password

This issue has be recreated:

• Locally
• On a staging site
• On a production website
• With only LifterLMS and a default theme