Fitted Cupboard With Angles - How To Prevent Tops Of Doors Catching When Opening?
Is the problem that the rear corner or rear face of the door collides with the face (or the front edge) of the cabinet box?

Concealed hinges are adjustable for the gap between the door and the cabinet box/face when the door is closed. People like the gap to be as narrow as possible, but some minimum amount of gap is needed so that the door can rotate about the hinge without hitting the cabinet box. Maybe you have the gap adjusted too tight. With that style of hinge one of the screws adjusts the door right and left (when closed) and the other screw allows adjustment of the gap. To me it appears the rear screw adjusts the gap.

Those look like very heavy/wide doors. By that I mean they'll apply a lot of leverage against the hinges. It might be worthwhile to again consider using two doors. Instead of putting one hinge on the left and the other on the right as originally conceived, install the hinges on the right-hand edge of both doors.