Transformation Running Failures (Transformation X not found)

We've encountered an issue running newly created transformations. Please stay with us, the fix currently being tested and will be deployed within the next hour. 

The symptom is a failing job with error Transformation 'x' not found. Only newly created transformations are affected by this bug, all old transformations should work.

We're sorry for this inconvenience!

EDIT 4.00 pm CEST: The bugfix has been deployed to production.