software-properties-gtk won´t start anymore

Hi altogether,

Im using BodhiLinux 4.5.0 (in a VM) and have a bit of a problem:

When trying to start software-properties-gtk in the terminal I get the following message and it wont start:

Code:Traceback (most recent call last):
File "/usr/bin/software-properties-gtk", line 32, in <module>
import aptsources
File "/usr/lib/python3/dist-packages/aptsources/__init__.py", line 3, in <module>
import apt_pkg
ImportError: /usr/lib/python3/dist-packages/apt_pkg.cpython-35m-i386-linux-gnu.so: symbol _ZN9pkgSystem9LockInnerEv, version APTPKG_5.0 not defined in file libapt-pkg.so.5.0 with link time
reference
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
from apport.report import Report
File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
import apport.fileutils
File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
from apport.packaging_impl import impl as packaging
File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 23, in <module>
import apt
File "/usr/lib/python3/dist-packages/apt/__init__.py", line 23, in <module>
import apt_pkg
ImportError: /usr/lib/python3/dist-packages/apt_pkg.cpython-35m-i386-linux-gnu.so: symbol _ZN9pkgSystem9LockInnerEv, version APTPKG_5.0 not defined in file libapt-pkg.so.5.0 with link time reference

Original exception was:
Traceback (most recent call last):
File "/usr/bin/software-properties-gtk", line 32, in <module>
import aptsources
File "/usr/lib/python3/dist-packages/aptsources/__init__.py", line 3, in <module>
import apt_pkg
ImportError: /usr/lib/python3/dist-packages/apt_pkg.cpython-35m-i386-linux-gnu.so: symbol _ZN9pkgSystem9LockInnerEv, version APTPKG_5.0 not defined in file libapt-pkg.so.5.0 with link time referenceI had a similar problem (see https://www.linuxquestions.org/quest...56#post6002056 ) but Im a bit at a loss at what to do now.

Could anyone help please?

Thanks a lot in advance.

Gretings.
Rosika :confused: