The one from Mahale will give you problems with the software of the bike's battery, you'll have to update it, if you buy the one from Volabike you won't have any problems, I have one.
I have a Megamo Kansas with a dapu 250w and 65Nm engine, a gravel bike with road wheels and I'm really happy with the reliable engine, 5 assistance modes and super quiet, nothing to envy to a specialized turbo levo that I also have, Price 1.900 Euros .
si ami tambien me da error de conexion con el x20,cuando quiere conecta y cuando quiere no conecta,no se que hacen,es increible, en el x35 si funciona bien.
I have the bianchi aria e road, and I have an additional extender, the problem that mahale extenders give is compatibility with the bike's software, so that this does not happen, you have to update the bike's firmware using some cables and the software that You have to provide mahale to the bike...
Probably what is failing you is the PAS sensor that goes on the right swingarm strap of the bicycle, they sell it on the Orbea page.
https://www.orbea.com/es-es/equipamiento/recambios/x121ttcc
la conficguracion del motor x20 ya funciona bien javier,desinstale y volvi a instalar la aplicacion, no se porque el otro dia no podia entrar en ese apartado, es en Android,gracias