ValueError: Expected a string for URI

[dragonxtek]

After install pathspider I tried to run it, but I couldn't:

pspdr measure -i wlp0s20f3 ecn < examples/webtest.ndjson > results.ndjson
WARNING:pr2modules.ipdb.main:Deprecation warning https://docs.pyroute2.org/ipdb_toc.html WARNING:pr2modules.ipdb.main:Deprecation warning https://docs.pyroute2.org/ipdb_toc.html WARNING:pr2modules.ipdb.main:Deprecation warning https://docs.pyroute2.org/ipdb_toc.html INFO:pathspider:activating spider... INFO:pathspider:starting pathspider INFO:pathspider:Creating observer Traceback (most recent call last): File "/usr/local/bin/pspdr", line 33, in sys.exit(load_entry_point('pathspider==2.1.0.dev0', 'console_scripts', 'pspdr')()) File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/cmd/base.py", line 62, in handle_args_wrapper handle_args(sys.argv) File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/cmd/base.py", line 57, in handle_args args.cmd(args) File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/cmd/measure.py", line 87, in run_measurement spider.start() File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/base.py", line 399, in start self.observer = self.create_observer() File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/base.py", line 159, in create_observer return Observer(self.libtrace_uri, File "/usr/local/lib/python3.10/dist-packages/pathspider-2.1.0.dev0-py3.10.egg/pathspider/observer.py", line 96, in init self._trace = libtrace.trace(lturi) # pylint: disable=no-member ValueError: Expected a string for URI