Sequel content could not be loaded

I purchased an upgrade from Sequel 3 to Cubase 9 elements. Installation went like a charm, but whenever I start Cubase now, I am greeted with a message saying:
Some content could not be loaded. Either, licenses are missing, or trial licenses have been expired.
Sequel Content 01
Sequel Content 02

Sequel Content 10

I had a fully licensed version of Sequel 3 before I upgraded, and the Sequel Bonus Pack 1 license is still active on my e-licenser.

Any ideas?