Hi, my name is ***** ***** I have been in the home improvement and repair field for 20 years. I will be very glad to help you today.
The most likely cause of this fault is a failure of the circular element.
To check it, isolate the power to the oven and take out the inner rear panel.
This is held in place by 4 screws,
Once out this will reveal the element and fan.
If it's obviously blown, order a replacement.
If not obvious, take out the screws holding the element in place and carefully take it and it's wiring into the oven cavity.
If you are unlucky the element will not have screws, in this instance you'll need to take the oven out of it's unit and take the top and rear covers off.
Take the wires off the element and use a multimeter to test it to see if it's open circuit. If it is, you'll need a new one.
Take the nuts holding it in place off.
Fit the new element, fix it in place, reassemble the oven and you should be back cooking again.
I haven't heard from you. Was the information I provided helpful?