The startup disk cannot be partitioned or restored to a single partition.

Hello everyone,

I am experiencing the same problem. I am trying to remove windows via bootcamp from my new Macbook Pro, but this error message appears when trying to do so: "The startup disk cannot be partitioned or restored to a single partition. The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows."

The terminal command gives me the following output:

Any help is highly appreciated!