Craftbukkti plugin "ashops" suddenly stopped working.

2013-05-22 16:23:19 [SEVERE] java.lang.NullPointerException
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.Location.getBlock(Location.java:82)
2013-05-22 16:23:19 [SEVERE] 	at pl.austindev.ashops.ShopsManager.restoreOffers(ShopsManager.java:340)
2013-05-22 16:23:19 [SEVERE] 	at pl.austindev.ashops.ShopsManager.restoreShops(ShopsManager.java:335)
2013-05-22 16:23:19 [SEVERE] 	at pl.austindev.ashops.ShopsManager.<init>(ShopsManager.java:70)
2013-05-22 16:23:19 [SEVERE] 	at pl.austindev.ashops.AShops.onEnable(AShops.java:63)
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.loadPlugin(CraftServer.java:282)
2013-05-22 16:23:19 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.enablePlugins(CraftServer.java:264)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.MinecraftServer.j(MinecraftServer.java:304)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.MinecraftServer.e(MinecraftServer.java:283)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.MinecraftServer.a(MinecraftServer.java:243)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.DedicatedServer.init(DedicatedServer.java:151)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:382)
2013-05-22 16:23:19 [SEVERE] 	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)