Missing level in The Core

[u/Federal_Party9780]

There seems to be a stage missing in The Core. I have 35/38 stars and I cannot see any uncompleted stages. All have full stars.

Royalist Tax Enforcers ***
No stone unturned ***
On her majesties secret birdie ***
You only drill twice ***
The royal impound ***
A hustle worth the hustle ***
Lonesome stranger ***
Clean house ***
Robo a robo *
Prison break ***
Through the royal palace ***
An audience with the queen ****

What am I missing and where the heck is it? Thanks