MCEdit version: 2.0.0-beta14
Python version: 2.7.15 (v2.7.15:ca079a3ea3, Apr 30 2018, 16:30:26) [MSC v.1500 64 bit (AMD64)]
Platform: win32
System version: Windows-8.1-6.3.9600
Processor: AMD64 Family 22 Model 0 Stepping 1, AuthenticAMD

Obtained a GL context with this format:
Valid: True
Version: 4.2
Hardware Accelerated: True
Depth buffer: True, 24
Double buffer: True
Rendering profile: PySide.QtOpenGL.QGLFormat.OpenGLContextProfile.CompatibilityProfile

Driver info:
GL_VERSION: 4.2.12422 Compatibility Profile Context 13.152.1.3000 (4, 2)
GL_VENDOR: 'ATI Technologies Inc.'
GL_RENDERER: 'AMD Radeon HD 8240'

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Unhandled Exception

Traceback (most recent call last):
  File "mcedit2\editorsession.py", line 1643, in viewOffsetChanged (self is a EditorTab)
  File "mcedit2\worldview\minimap.py", line 187, in currentViewMatrixChanged (self is a MinimapWorldView)
  File "mcedit2\util\raycast.py", line 30, in rayCastInBounds
  File "mcedit2\util\profiler.py", line 73, in _wrapper (self is a Profiler)
  File "mcedit2\util\raycast.py", line 77, in rayCast
  File "mcedit2\util\raycast.py", line 215, in advanceToChunk
  File "mceditlib\worldeditor.py", line 831, in getChunk (self is a WorldEditorDimension)
  File "mceditlib\worldeditor.py", line 499, in getChunk (self is a WorldEditor)
  File "mceditlib\cachefunc.py", line 77, in __call__
  File "mceditlib\worldeditor.py", line 477, in _getChunkDataRaw (self is a WorldEditor)
  File "mceditlib\anvil\adapter.py", line 922, in readChunk (self is a AnvilWorldAdapter)
AnvilChunkFormatError: [Errno Error loading chunk: KeyError('Key Blocks not found.',)] None: <traceback object at 0x00000063409D1908>