I am attempting to go to the Farmworld, though when I select to open the portal there, there's an error saying "Error, portal blocked!" I also tried with the End and Nether Dimensions, although the same message appeared. Can a Mod/Admin help?
hmm when that problem happens i just move it to another place and it works fine... don't really know :/
are you wearing any armour that gives off light ? or any items near that may place invisible entitys ? try removing amour and anything near it and create the portal and if its still broken you may need a jradmin or highers help