Won't delete partitions
Hi!
I tried to bootcamp my Macbook from early 2015 with macOS Mojave. I got an error saying that the disk couldn't be partitioned. When I looked in disk utility the partition had been created, but now I can't delete the partition and Bootcamp says that "The start disk could not be partitioned or restored to a single partition". It also says "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.". Is there any way to delete this partition?
MacBook, iOS 12