Some people have this problem on normal version, because that i did simple version of the mod. I don't know why happens because is absolutely random, sometimes you can complete the game without problem and sometimes the same person get stuck on one of this teleports (random too because you can have this problem on first or last teleport or...) and script is always the same and tested. I can't reproduce this issue myself.
You can't use this save on simple version of the game to open the teleport because there are different mods.
Try to put this gems in your inventory, not inside a bag or box.I can tell you a console command to jump to the next tower but i'm not sure if you have this problem later with another teleport.
In your case put that values on Party:setPosition(x, y, facing, level):
Party:setPosition(4, 1, 2, 13)
If you need to activate the console do that:
- go to Documents\Almost Human\Legend of Grimrock
- open grimrock.cfg (with notepad)
- at the bottom (or anywhere) add the line:
console = true
if you like you can put this line too
consoleKey = 115
115 should make F4 open/close the console (i don't remember default key for console)
Tell me if you can advance with that option and apologies for that problem, i did this mod long time ago and can't avoid some mistakes.
Second option begin a new game on simple version of the mod (nasty but safe option).