[Can't obtain barrier blocks]

You might be able to use /give [player name] minecraft:barrier but that might have not have been implemented yet in that version of minecraft. Sorry I couldn't help more.

[Materials and You doesn't work]

So recently I have, for the first time in a while, started a AotBT SSP. One of the first things I discovered is that you cannot see the other pages in Materials and You. The arrow to switch to the next page just doesn't do anything when i click on it. The Openblocks book works fine though. If anyone has a solution to this problem it would be greatly appreciated.