What happened to the dimension on Sketch1?
The line isn't constrained to the origin either.
I recommend backing up a bit and mastering a simple sketch first.
Rather than Extrude and Fillet, I would probably use a simple Revolve-Cut instead.
No extra work plane needed.
Hello, take a look at this forum thread Circular pattern for fillet won't "create instances for the pattern. Try again by...." There is a similar issue with mirroring and patterning fillets and this thread goes into how to work around.