QGIS » QGIS Application

I've tried a couple of tools and I think I've narrowed this down to only occurring to the QGIS Clip Geoprocessing tool (I haven't tried everything though).

I've uploaded the data in Geopackage format.

I take a line layer (streams) and clip it with a polygon (watershed). If I save to anything (scratch, geopackage, spatialite, postgis) but a shapefile I get an error.

I am running QGIS on Ubuntu 16.04 and am using the QGIS and ubuntuGIS repository.

The Error is:

An error has occurred while executing Python code:

TypeError: coercing to Unicode: need string or buffer, Type found
Traceback (most recent call last):
File "/usr/share/qgis/python/plugins/processing/gui/AlgorithmDialog.py", line 290, in accept
if runalg(self.alg, self):
File "/usr/share/qgis/python/plugins/processing/gui/AlgorithmExecutor.py", line 49, in runalg
alg.execute(progress or SilentProgress())
File "/usr/share/qgis/python/plugins/processing/core/GeoAlgorithm.py", line 219, in execute
unicode(e.message, errors='replace') + self.tr('\
See log for more details'), lines, e)
TypeError: coercing to Unicode: need string or buffer, Type found

Python version: 2.7.12 (default, Nov 19 2016, 06:48:10) [GCC 5.4.0 20160609]
QGIS version: 2.18.3 Las Palmas, 77b8c3d

Python Path:
/usr/share/qgis/python/plugins/processing
/usr/share/qgis/python
/home/rjhale/.qgis2/python
/home/rjhale/.qgis2/python/plugins
/usr/share/qgis/python/plugins
/usr/lib/python2.7
/usr/lib/python2.7/plat-x86_64-linux-gnu
/usr/lib/python2.7/lib-tk
/usr/lib/python2.7/lib-old
/usr/lib/python2.7/lib-dynload
/home/rjhale/.local/lib/python2.7/site-packages
/usr/local/lib/python2.7/dist-packages
/usr/lib/python2.7/dist-packages
/usr/lib/python2.7/dist-packages/PILcompat
/usr/lib/python2.7/dist-packages/gtk-2.0
/usr/lib/python2.7/dist-packages/wx-3.0-gtk2
/home/rjhale/.qgis2//python
/home/rjhale/.qgis2/python/plugins/DigitizingTools/tools
/home/rjhale/temp