Open-GL Fehler in Programmen

[GoodKing]

Hallo,
Weiß jemand, was da schief gelaufen ist?
Ein Neustart hat nichts gebracht.

Obtained a GL context with this format:
Valid: True
Version: 4.6
Hardware Accelerated: True
Depth buffer: True, 24
Double buffer: True
Rendering profile: PySide.QtOpenGL.QGLFormat.OpenGLContextProfile.CompatibilityProfile
Driver info:
GL_VERSION: 4.6.14761 Compatibility Profile Context 21.30.23.01 30.0.13023.1012 (4, 6)
GL_VENDOR: 'ATI Technologies Inc.'
GL_RENDERER: 'AMD Radeon(TM) Graphics'

Unhandled Exception
Traceback (most recent call last):
File "mcedit2\editorsession.py", line 1024, in import_ (self is a EditorSession)
File "mcedit2\editorsession.py", line 1164, in importSchematic (self is a EditorSession)
File "mceditlib\worldeditor.py", line 233, in __init__ (self is a WorldEditor)
File "mceditlib\findadapter.py", line 62, in findAdapter
File "mceditlib\schematic.py", line 139, in __init__ (self is a SchematicFileAdapter)
File "src\mceditlib\nbt.pyx", line 466, in mceditlib.nbt._TAG_Compound.__getitem__
KeyError: 'Key Blocks not found.