AS version: 1.4.5
MC version 1.10.2

In The Simple Life 2 mod pack I needed a cake to make a Winter Rune from Botania and the only way is villager trade or using an AS lens to make a cake from a pumpkin. No farmers found after 8 villages so I built the Starlight Crafting Alter and placed the ingredients and started the process to create the lens. The starlight pulsed for 5-10 seconds and got the following error (luckily I had backed up the game just 2 hours prior):

java.lang.NullPointerException: Ticking block entity
at hellfirepvp.astralsorcery.common.item.crystal.CrystalProperties.applyCrystalProperties(CrystalProperties.java:182)
at hellfirepvp.astralsorcery.common.crafting.altar.recipes.LensRecipe.getOutput(LensRecipe.java:63)
at hellfirepvp.astralsorcery.common.tile.TileAltar.finishCrafting(TileAltar.java:236)
at hellfirepvp.astralsorcery.common.tile.TileAltar.doTryCraft(TileAltar.java:218)
at hellfirepvp.astralsorcery.common.tile.TileAltar.func_73660_a(TileAltar.java:122)
at net.minecraft.world.World.func_72939_s(World.java:1804)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:620)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:149)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

Full crash log at: https://pastebin.com/wTEG8pzm

Cannot re-open the world now, it crashes immediately. Same error as above each time.

Need to know the stats on the involved crystals. Were they quest rewards? Seems like something wasn't properly assigned as a trait.

Also, as 1.10 version of the mod, not really going to have support for any errors, as it is an End-Of-Life version.

The crystals were either quest rewards or I got them from the chest under the monument that had the floating crystal (where the wand & crafting table were made). I know I got them from both sources, not sure which one I used.

EDIT: I went to the backup and checked, yes there are two types. One type has the attributes Size, Purity, Cutting and the other type does not have the attributes. I tossed out the latter and kept only the ones with the attributes.