Here's the file report:

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 6/22/16 7:44 PM
Description: Server forgot to send required information to construct BlockEntity

java.lang.RuntimeException: Missing BlockEntity
at bqy.b(SourceFile:162)
at bqu.a(SourceFile:100)
at bqu.run(SourceFile:43)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– BlockEntity missing instance data –
Details:
BlockState: minecraft:piston_extension[facing=east,type=sticky]
Block coordinates: World: (65,52,628), Chunk: (at 1,3,4 in 4,39; contains blocks 64,0,624 to 79,255,639), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bnn['CIeansed'/35120, l='MpServer', x=125.27, y=110.00, z=627.90]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (1,87,687), Chunk: (at 1,5,15 in 0,42; contains blocks 0,0,672 to 15,255,687), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
Level time: 35711085 game time, 1073868 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 146 total; [bnn['CIeansed'/35120, l='MpServer', x=125.27, y=110.00, z=627.90], xz['entity.ItemFrame.name'/1280, l='MpServer', x=61.03, y=110.50, z=686.50], yp['Creeper'/34560, l='MpServer', x=125.50, y=63.00, z=562.50], yb['Painting'/130, l='MpServer', x=15.50, y=111.50, z=637.97], xz['entity.ItemFrame.name'/1281, l='MpServer', x=61.03, y=110.50, z=685.50], xz['entity.ItemFrame.name'/1282, l='MpServer', x=61.03, y=110.50, z=684.50], xz['entity.ItemFrame.name'/1283, l='MpServer', x=61.03, y=110.50, z=683.50], xz['entity.ItemFrame.name'/1284, l='MpServer', x=61.03, y=110.50, z=682.50], zh['Witch'/34820, l='MpServer', x=64.30, y=138.60, z=589.70], xz['entity.ItemFrame.name'/1285, l='MpServer', x=61.03, y=110.50, z=681.50], xz['entity.ItemFrame.name'/1286, l='MpServer', x=61.03, y=110.50, z=680.50], xz['entity.ItemFrame.name'/1287, l='MpServer', x=61.03, y=110.50, z=679.50], xz['entity.ItemFrame.name'/1288, l='MpServer', x=61.03, y=110.50, z=678.50], zh['Witch'/35080, l='MpServer', x=64.92, y=138.26, z=585.59], yb['Painting'/335, l='MpServer', x=18.50, y=111.50, z=637.97], xz['entity.ItemFrame.name'/1289, l='MpServer', x=61.03, y=110.50, z=677.50], yb['Painting'/336, l='MpServer', x=17.00, y=112.50, z=637.97], xz['entity.ItemFrame.name'/1290, l='MpServer', x=63.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1291, l='MpServer', x=62.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1292, l='MpServer', x=61.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1293, l='MpServer', x=61.03, y=110.50, z=688.50], zh['Witch'/1550, l='MpServer', x=65.91, y=145.55, z=579.52], aaw['entity.MinecartRideable.name'/1300, l='MpServer', x=65.51, y=111.00, z=574.49], zi['Zombie'/1301, l='MpServer', x=66.45, y=138.12, z=585.36], zh['Witch'/1304, l='MpServer', x=65.52, y=133.00, z=593.30], zd['Skeleton'/1307, l='MpServer', x=70.40, y=142.00, z=594.34], yk['item.item.stick'/1309, l='MpServer', x=67.79, y=132.00, z=592.40], yk['item.item.sugar'/35103, l='MpServer', x=63.93, y=110.00, z=592.88], zh['Witch'/34847, l='MpServer', x=64.74, y=138.37, z=588.30], aaw['entity.MinecartRideable.name'/1315, l='MpServer', x=64.49, y=101.00, z=628.51], yk['item.tile.cactus'/1316, l='MpServer', x=71.40, y=69.00, z=655.28], zd['Skeleton'/1317, l='MpServer', x=79.32, y=68.00, z=648.50], xz['entity.ItemFrame.name'/1318, l='MpServer', x=68.97, y=110.50, z=680.50], xz['entity.ItemFrame.name'/1319, l='MpServer', x=68.97, y=110.50, z=681.50], xz['entity.ItemFrame.name'/1320, l='MpServer', x=68.97, y=110.50, z=682.50], xz['entity.ItemFrame.name'/1321, l='MpServer', x=68.97, y=110.50, z=683.50], xz['entity.ItemFrame.name'/1322, l='MpServer', x=68.97, y=110.50, z=684.50], xz['entity.ItemFrame.name'/1323, l='MpServer', x=68.97, y=110.50, z=685.50], zh['Witch'/35116, l='MpServer', x=64.87, y=138.60, z=582.00], xz['entity.ItemFrame.name'/1324, l='MpServer', x=68.97, y=110.50, z=686.50], xz['entity.ItemFrame.name'/1325, l='MpServer', x=68.97, y=110.50, z=687.50], xz['entity.ItemFrame.name'/1326, l='MpServer', x=68.97, y=110.50, z=688.50], xz['entity.ItemFrame.name'/1327, l='MpServer', x=67.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1328, l='MpServer', x=66.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1329, l='MpServer', x=65.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1330, l='MpServer', x=64.50, y=110.50, z=688.97], xz['entity.ItemFrame.name'/1331, l='MpServer', x=68.50, y=110.50, z=688.97], zd['Skeleton'/1332, l='MpServer', x=64.50, y=51.00, z=705.50], xz['entity.ItemFrame.name'/312, l='MpServer', x=1.03, y=64.50, z=677.50], zi['Zombie'/1336, l='MpServer', x=95.50, y=42.00, z=563.77], xz['entity.ItemFrame.name'/313, l='MpServer', x=1.03, y=66.50, z=677.50], xz['entity.ItemFrame.name'/314, l='MpServer', x=1.03, y=64.50, z=676.50], zi['Zombie'/1338, l='MpServer', x=83.30, y=59.89, z=648.30], yp['Creeper'/35130, l='MpServer', x=100.50, y=36.00, z=550.50], xz['entity.ItemFrame.name'/315, l='MpServer', x=1.03, y=66.50, z=676.50], yp['Creeper'/1339, l='MpServer', x=94.50, y=25.00, z=661.50], zi['Zombie'/35131, l='MpServer', x=109.76, y=33.00, z=559.48], xz['entity.ItemFrame.name'/316, l='MpServer', x=1.03, y=64.50, z=675.50], zi['Zombie'/1340, l='MpServer', x=94.50, y=61.00, z=666.50], xz['entity.ItemFrame.name'/317, l='MpServer', x=1.03, y=66.50, z=675.50], zd['Skeleton'/35133, l='MpServer', x=122.83, y=31.00, z=556.41], wa['Bat'/35134, l='MpServer', x=125.45, y=31.46, z=554.95], yp['Creeper'/1343, l='MpServer', x=104.50, y=31.00, z=572.50], zi['Zombie'/35135, l='MpServer', x=112.50, y=40.00, z=550.50], zi['Zombie'/1344, l='MpServer', x=103.50, y=31.00, z=574.50], zi['Zombie'/35136, l='MpServer', x=115.20, y=40.00, z=550.47], zd['Skeleton'/1345, l='MpServer', x=101.78, y=31.00, z=560.53], wa['Bat'/35137, l='MpServer', x=124.72, y=31.72, z=556.42], yp['Creeper'/1346, l='MpServer', x=103.50, y=31.00, z=560.50], yq['Enderman'/35138, l='MpServer', x=131.58, y=54.00, z=568.50], zi['Zombie'/1347, l='MpServer', x=102.50, y=31.00, z=570.50], yk['item.item.rottenFlesh'/35139, l='MpServer', x=142.69, y=71.00, z=661.64], wa['Bat'/1348, l='MpServer', x=101.25, y=34.10, z=567.41], zi['Zombie'/35140, l='MpServer', x=156.50, y=41.00, z=571.50], yp['Creeper'/1349, l='MpServer', x=100.50, y=32.00, z=561.50], wn['Squid'/35141, l='MpServer', x=152.16, y=60.02, z=584.26], wa['Bat'/1350, l='MpServer', x=104.74, y=31.40, z=561.63], wn['Squid'/35142, l='MpServer', x=156.77, y=61.82, z=588.77], wn['Squid'/1351, l='MpServer', x=109.60, y=60.54, z=599.52], yp['Creeper'/35143, l='MpServer', x=158.93, y=33.00, z=604.57], wn['Squid'/1352, l='MpServer', x=114.83, y=58.23, z=616.82], yp['Creeper'/35144, l='MpServer', x=157.84, y=33.00, z=603.54], wn['Squid'/1353, l='MpServer', x=109.53, y=59.07, z=612.60], yp['Creeper'/35145, l='MpServer', x=151.37, y=51.00, z=600.01], wn['Squid'/1354, l='MpServer', x=105.25, y=59.62, z=604.77], yp['Creeper'/35146, l='MpServer', x=151.76, y=51.00, z=599.30], xz['entity.ItemFrame.name'/331, l='MpServer', x=27.50, y=68.50, z=577.03], zd['Skeleton'/1355, l='MpServer', x=110.50, y=25.00, z=666.50], zd['Skeleton'/35147, l='MpServer', x=158.94, y=33.00, z=619.72], zd['Skeleton'/1356, l='MpServer', x=110.50, y=25.00, z=666.50], yp['Creeper'/35148, l='MpServer', x=159.46, y=33.00, z=618.30], zd['Skeleton'/1357, l='MpServer', x=110.50, y=25.00, z=665.50], yp['Creeper'/35149, l='MpServer', x=151.79, y=35.00, z=617.49], yp['Creeper'/1358, l='MpServer', x=109.50, y=34.00, z=680.50], yp['Creeper'/35150, l='MpServer', x=158.55, y=34.00, z=622.14], yb['Painting'/335, l='MpServer', x=18.50, y=111.50, z=637.97], zi['Zombie'/35151, l='MpServer', x=152.50, y=48.00, z=610.50], yb['Painting'/336, l='MpServer', x=17.00, y=112.50, z=637.97], yk['item.item.arrow'/35152, l='MpServer', x=155.36, y=69.00, z=634.53], zd['Skeleton'/35153, l='MpServer', x=155.50, y=52.00, z=645.50], zh['Witch'/35154, l='MpServer', x=145.50, y=54.00, z=648.50], zg['Spider'/35155, l='MpServer', x=147.50, y=54.00, z=645.50], wa['Bat'/1364, l='MpServer', x=124.84, y=36.10, z=567.75], zd['Skeleton'/35156, l='MpServer', x=154.25, y=52.00, z=647.51], yq['Enderman'/35157, l='MpServer', x=148.50, y=53.00, z=646.50], zd['Skeleton'/1366, l='MpServer', x=124.50, y=44.00, z=635.50], wa['Bat'/35158, l='MpServer', x=145.25, y=55.10, z=648.55], wa['Bat'/1367, l='MpServer', x=106.51, y=45.79, z=619.48], zi['Zombie'/35159, l='MpServer', x=149.50, y=32.00, z=662.50], wa['Bat'/35160, l='MpServer', x=149.75, y=54.61, z=669.61], wa['Bat'/35161, l='MpServer', x=148.10, y=57.00, z=685.58], wa['Bat'/35162, l='MpServer', x=147.90, y=57.05, z=685.62], wn['Squid'/35163, l='MpServer', x=163.03, y=59.49, z=564.03], wn['Squid'/35164, l='MpServer', x=162.43, y=56.63, z=573.50], wn['Squid'/35165, l='MpServer', x=164.74, y=55.64, z=576.98], wa['Bat'/35166, l='MpServer', x=169.61, y=13.03, z=597.64], wa['Bat'/35167, l='MpServer', x=169.12, y=15.12, z=595.04], zd['Skeleton'/35168, l='MpServer', x=161.50, y=33.00, z=619.50], wa['Bat'/35169, l='MpServer', x=159.96, y=33.32, z=618.90], zd['Skeleton'/35170, l='MpServer', x=163.50, y=49.00, z=610.50], zi['Zombie'/35171, l='MpServer', x=165.23, y=49.00, z=616.41], zi['Zombie'/35172, l='MpServer', x=160.55, y=32.00, z=635.80], yp['Creeper'/35173, l='MpServer', x=160.50, y=32.00, z=633.50], zi['Zombie'/35174, l='MpServer', x=160.81, y=45.00, z=635.31], zh['Witch'/35175, l='MpServer', x=164.50, y=53.00, z=655.50], zg['Spider'/35176, l='MpServer', x=162.50, y=52.00, z=667.50], zi['Zombie'/35177, l='MpServer', x=169.85, y=13.12, z=675.45], zi['Zombie'/35178, l='MpServer', x=169.85, y=12.00, z=675.76], zi['Zombie'/35179, l='MpServer', x=169.70, y=39.00, z=683.70], wa['Bat'/35181, l='MpServer', x=184.62, y=29.40, z=565.62], yp['Creeper'/35182, l='MpServer', x=179.50, y=70.00, z=599.50], yb['Painting'/130, l='MpServer', x=15.50, y=111.50, z=637.97], zh['Witch'/34967, l='MpServer', x=64.71, y=139.55, z=580.30], yq['Enderman'/34995, l='MpServer', x=127.54, y=54.00, z=567.48], wa['Bat'/34997, l='MpServer', x=127.57, y=56.10, z=563.41], yp['Creeper'/34758, l='MpServer', x=69.88, y=151.03, z=577.30], wa['Bat'/34771, l='MpServer', x=107.44, y=44.08, z=621.19], zd['Skeleton'/34516, l='MpServer', x=118.50, y=65.00, z=692.50], wr['Skeleton Horse'/1270, l='MpServer', x=46.91, y=66.63, z=691.65], aar['Minecart with Chest'/1274, l='MpServer', x=65.36, y=116.09, z=593.50], zh['Witch'/1276, l='MpServer', x=66.41, y=133.00, z=593.30], zh['Witch'/1277, l='MpServer', x=65.04, y=138.03, z=590.90], aav['Minecart with Hopper'/1278, l='MpServer', x=48.50, y=63.06, z=647.64], yp['Creeper'/34558, l='MpServer', x=119.83, y=63.00, z=563.55], xz['entity.ItemFrame.name'/1279, l='MpServer', x=61.03, y=110.50, z=687.50], yp['Creeper'/34559, l='MpServer', x=122.53, y=63.00, z=563.10]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Non-integrated multiplayer server
Stacktrace:
at bln.a(SourceFile:364)
at bcx.b(SourceFile:2535)
at bqu.run(SourceFile:49)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.10.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 79864984 bytes (76 MB) / 260665344 bytes (248 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.10.1
LWJGL: 2.9.4
OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: CustomFaithful1.9.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz