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    Take a look at this blog post on how to set up Grid2 A user related (in the email group on the source) that using older selenium libs solves this exception.

Solutions on the web

via GitHub by exZerry
, 1 year ago
data cannot be null
via GitHub by SantaGitHub
, 1 year ago
java.lang.NullPointerException: data cannot be null	at	at net.citizensnpcs.api.npc.SimpleMetadataStore.checkPrimitive(	at net.citizensnpcs.api.npc.SimpleMetadataStore.setPersistent(	at net.citizensnpcs.api.npc.AbstractNPC$1.setPersistent(	at	at	at	at$	at	at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftScheduler.mainThreadHeartbeat(	at net.minecraft.server.v1_10_R1.MinecraftServer.D(	at net.minecraft.server.v1_10_R1.DedicatedServer.D(	at net.minecraft.server.v1_10_R1.MinecraftServer.C(	at	at Source)