Urgent!Need help with Multiverse Nether, Separate economy.

Hello, I have an issue, I have Multiverse core,inventories and Nether portals but nether portals don't go anywhere.I linked it with nether and it leaded to survival nether, then I made a new map Called Hardcore_nether and linked it with hardcore.That somehow worked but, sometimes I am spawned inside netherrack, and it doesn't create a new portal either.Also you can't return from nether to hardcore main map.Whenever I go inside the nether portal I get this error too
"The portal goes nowhere!"
No specific nether world has been linked to this world and 'Hardcore_nether_nether is not a world.'
Thank you in advance.