Infinite Loop when using Teleport (Can't find why)


I am trying to make a portal system , when my character spawns the portals and takes one of them has to teleport to the other one.

Its working fine when I take my “Portal End” it teleports to my “Portal Start”, but If I try to take the first one my game crash because Infinite Loop Error on Portal Start BP.

This is how I spawn and use my portals, If anyone knows what is happening please help.