/locate not working on Adventure Time Mash up world

the command /locate does not work in this world. Using /locate endcity or /locate fortress in the overworld will display the text "no valid structure found in this dimension" (which should be correct); however, using /locate endcity in the end or /locate fortress in the nether will not display any locations. Using /locate for any of the overworld structures (e.g. village, stronghold, monument, or mansion) will not display anything.