Page not shown in Prod-environment - only in staging environment


On Wpengine's hosting service I have following:
In staging
In prod:

Student-login page is not shown in prod.
I have cloned staging environment, where page appears (including all tables) to Prod. still it gives a "page not found" error for the login-page on Prod.
Setting for plugin/theme is to use a virtual page.

/courses-dashboard/ has same error.

Looking forward hearing from you.