ERROR:root:Fault Handler module not found.
INFO    1570015457.56        single_application:28   (root)  __init__()
INFO    1570015457.60        single_application:54   (root)    self._outSocket.error() = '0'
INFO    1570015457.60        single_application:56   (root)  received QLocalSocket.ConnectionRefusedError; removing server.
INFO    1570015457.60        single_application:68   (root)  close()
INFO    1570015457.60        single_application:75   (root)  close(): returning
INFO    1570015457.60        single_application:64   (root)  __init__(): returning
Icon theme "gnome" not found.
QFont::setPointSize: Point size <= 0 (-1), must be greater than 0
QFont::setPointSize: Point size <= 0 (-1), must be greater than 0
ERROR   1570015457.99               run_tribler:134  (root)  No module named pyqtgraph
Traceback (most recent call last):
  File "run_tribler.py", line 127, in <module>
    window = TriblerWindow()
  File "/usr/share/tribler/TriblerGUI/tribler_window.py", line 137, in __init__
    uic.loadUi(get_ui_file_path('mainwindow.ui'), self)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/__init__.py", line 237, in loadUi
    return DynamicUILoader(package).loadUi(uifile, baseinstance, resource_suffix)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/Loader/loader.py", line 72, in loadUi
    return self.parse(filename, resource_suffix, basedir)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 1030, in parse
    actor(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 828, in createUserInterface
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 264, in createWidget
    self.stack.push(self.setupObject(widget_class, parent, elem))
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/uiparser.py", line 228, in setupObject
    obj = self.factory.createQObject(clsname, name, args, is_attribute)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/objcreator.py", line 100, in createQObject
    factory = self.findQObjectType(classname)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/objcreator.py", line 125, in findQObjectType
    w = module.search(classname)
  File "/usr/lib/python2.7/site-packages/PyQt5/uic/Loader/qobjectcreator.py", line 113, in search
    module = __import__(mname, {}, {}, (cls,))
  File "/usr/share/tribler/TriblerGUI/widgets/trustgraphpage.py", line 11, in <module>
    import pyqtgraph as pg
ImportError: No module named pyqtgraph
ERROR   1570015458.01            tribler_window:73   (root)  Traceback (most recent call last):
  File "run_tribler.py", line 135, in <module>
    error_and_exit("Import Error", "Import error: {0}".format(ie))
  File "/usr/share/tribler/check_os.py", line 29, in error_and_exit
    from Tkinter import Tk, Canvas, DISABLED, INSERT, Label, Text, WORD
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 39, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: libtk8.6.so: cannot open shared object file: No such file or directory

Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/share/tribler/TriblerGUI/tribler_window.py", line 76, in on_exception
    self.delete_tray_icon()
  File "/usr/share/tribler/TriblerGUI/tribler_window.py", line 287, in delete_tray_icon
    if self.tray_icon:
AttributeError: 'TriblerWindow' object has no attribute 'tray_icon'

Original exception was:
Traceback (most recent call last):
  File "run_tribler.py", line 135, in <module>
    error_and_exit("Import Error", "Import error: {0}".format(ie))
  File "/usr/share/tribler/check_os.py", line 29, in error_and_exit
    from Tkinter import Tk, Canvas, DISABLED, INSERT, Label, Text, WORD
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 39, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: libtk8.6.so: cannot open shared object file: No such file or directory