Okay so I have the server up and running after some finagling but I got it up and running. Now my situation is that when I go to start I none of the starting items (in which I work around) and I go grab the quest book and first of all i cannot grab the book from the extra UI from the side with all the item (i forget what the mod is called) it says that the item doesn't exist. Then i went into creative in a new world (just deleted the default platform) and grabbed it from creative and when i right click on anything it disappears from my inventory. I have run out of ideas. I am currently using a Agrarian skies server 1.1.14 and client of 1.1.14.
The UI your thinking of is Not Enough Items. As for the book not being able to be spawned it could be the file for it is missing or corrupted, try reinstalling the pack and if it continues to be an issue post it to Jadedcat here. https://github.com/jadedcat/AS2Configs/issues