No OSMC skin and many errors

Hi,

after some configurations (e.g. switching to german language, setting up DVBViewer AddOn, etc.) and restarting my Pi2 I got many errors and no skin (only the background). Here is what the kodi.log says:

22:02:16 T:1823269920 NOTICE: -->Python Interpreter Initialized<–
22:02:16 T:1957175296 NOTICE: Previous line repeats 2 times.
22:02:16 T:1957175296 ERROR: Control 9000 in window 10000 has been asked to focus, but it can’t
22:02:17 T:1806492704 NOTICE: -->Python Interpreter Initialized<–
22:02:17 T:1823269920 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<–
*- NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
*Error Type: <type ‘exceptions.ValueError’>
*Error Contents: bad marshal data (tuple size out of range)
*Traceback (most recent call last):
*File “/usr/share/kodi/addons/script.module.osmcsetting.updates/service.py”, line 33, in
*import update_service
*File “/usr/share/kodi/addons/script.module.osmcsetting.updates/resources/lib/update_service.py”, line 9, in
*import json
*File “/usr/lib/python2.7/json/init.py”, line 109, in
*from .encoder import JSONEncoder
*ValueError: bad marshal data (tuple size out of range)
*–>End of Python script error report<–
22:02:17 T:1806492704 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<–
*- NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
*Error Type: <type ‘exceptions.ValueError’>
*Error Contents: bad marshal data (tuple size out of range)
*Traceback (most recent call last):
*File “/usr/share/kodi/addons/service.osmc.settings/service.py”, line 38, in
*import json
*File “/usr/lib/python2.7/json/init.py”, line 109, in
*from .encoder import JSONEncoder
*ValueError: bad marshal data (tuple size out of range)
*–>End of Python script error report<–
22:02:17 T:1814881312 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<–
*- NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
*Error Type: <type ‘exceptions.ValueError’>
*Error Contents: bad marshal data (tuple size out of range)
*Traceback (most recent call last):
*File “/usr/share/kodi/addons/service.skin.widgets/default.py”, line 35, in
*import json as simplejson
*File “/usr/lib/python2.7/json/init.py”, line 109, in
*from .encoder import JSONEncoder
*ValueError: bad marshal data (tuple size out of range)
*–>End of Python script error report<–
22:02:17 T:1763476512 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<–
*- NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
*Error Type: <type ‘exceptions.ValueError’>
*Error Contents: bad marshal data (tuple size out of range)
*Traceback (most recent call last):
*File “/usr/share/kodi/addons/script.skinshortcuts/default.py”, line 17, in
*import json as simplejson
*File “/usr/lib/python2.7/json/init.py”, line 109, in
*from .encoder import JSONEncoder
*ValueError: bad marshal data (tuple size out of range)
*–>End of Python script error report<–

Can anybody help me?