If there is no voltage across the element terminals this would suggest a control board or control switch failure.
The best thing to do is trace the element cables back to the control board or switch, perform a continuity test, and see if there is a lose connections.
Based on experience this sounds most likely to be a lose termination\connection or failing that a faulty component on the control board, the control switch is unlikely to be at fault since the fan is operating when the fan mode is selected, and the thermostat is working as the other element is working as expected.
The fan should be on a separate circuit, since the element will switch on and off as the thermostat calls for heat, but the fan remains constant even when there isnt a call for heat, so it is not in serial or parallel.
I would start by looking at the main oven function control which is the far left hand side as your looking at the front.
Please let me know how you get on stripping it down, if you begin to struggle and would like me to recommend an engineer to attend site please let me know your post code.
I havent heard back from you in the last few days, and just wanted to check if you still require assistance, I would appreciate it if you could rate the service received.