Ford GT fuel flap error

Indeed. A similar problem was observed on a 2018 BMW 4 series. The locking mechanism malfunctioned, rendering the fuel filler flap inoperable. Was there any recent mechanical work performed on the vehicle in proximity to the fuel filler area?

Nope, no recent work around there. Just started happening out of the blue. Could it be the release mechanism itself?

Given the absence of recent interventions and the observed symptoms, it is plausible that the electric actuator or associated linkage, if present in your model, has become defective. A diagnostic evaluation at an authorized workshop is advisable to ascertain the precise cause and determine the appropriate remedial action. Expect repair costs in the neighborhood of 210€.

Thanks. Looks like a trip to the shop is in order. Will post what they find. Turns out it was indeed the linkage. Sorted!