Able to place nether portal blocks in the End; teleporting to the nether won't load chunks

i use a command /give name 119 and /give name 90

i can't set a ender portal(ID119) in a nether but i can set a nether portal(ID90) in the end.

now when i go from the end in a nether portal, i portet in a nether but i have a purple screen, i esc the world an join now and i can see a nether world.