You are using maybe this camera: https://yuneec-dron.pl/kamery/566-radiometryczna-kamera-termowizyjna-yuneec-e20tvx-pro-dla-h520e-h850.html ?
I also tried to import photos from e20tvx and there is problem to process photos in PIX4D Mapper. I did it with photos form mavic 2 zoom and it works...