Help, i triend to calculate active camera and i got some error note

[PerfectBlue1]

Am i doing something wrong or is this a bug ? This is my first time using blam. Im not experienced with Grease Pencil, but i think i did everything right. I made 2 lines, i clicked on + icon, i added another Gpen and made another 2 lines and this is what i got.

[Grkhalil]

@PerfectBlue1 got the same problem :/