reminder that colors!3d has online servers shared with switch users so u can show ur art off:33(also its just a good app too)

does anybody know how to fix error 001-0502 on 3ds bc its back and i am NOT going silent on colors!3d again >:(

i need help, im on pretendo for 3ds and my juxt works fine (duh) but i cant use online for compatable games anymore like colors!3d or whatever, also cant come online on friends list :[