Oven warmer trips GFCI and bake element doesn't work
Igniter grounded out and failed
Since your stove appears to use an electronic hot-surface igniter for the oven burner, and it's most likely a GFCI that tripped instead of a regular breaker, then I suspect the igniter grounded out and failed when you turned the warming function on, which led to the GFCI trip.  You'll need to replace it (or have an appliance tech replace it for you) to revive the oven, most likely.