If I select the GLA-AMS-HKG flights rather than GLA-AMS-CDG-HKG then the booking engine lets me past the screen where you input the name to proceed to the seat selection and payment screens.
When I select GLA-AMS-CDG-HKG via the app when it tries to move beyond the screen with your name/details on it, it gives an error saying “The API has neither a response or an answer.”
Normally I would just book the most direct routing, however it is more than 2 x the price to route via AMS with 1 stop rather than the 2 stop option via AMS and CDG.
Even the option to originate in EDI is £200 more expensive and GLA is significantly closer to me.