This may be an issue with the actual map itself. It has happened to me multiple times and for me is generally the cause of the following things:
-The ingame server needs to be reset (It gets reset at random. On an average of either a couple times a day or once every couple days I forgot xD)
-The map is overly complex. There may be too many meshes in it and the map maker may have to start cleaning it.
-The map may be too big.
-There could be a glitch with the character
-It may be a complete glitch and may go away if you wait it out.
-The map file may be corrupted. Can anyone else get in?
-If no one can get in, tell the map maker to simply rename the map file and portal name, sometimes this does the trick. youll all have to re download but its worth it.
c: hope I helped.