M-x pyvenv-activate results in 'wrong-type-argument'

[dolphrundgren]

When I attempt to activate a virtualenv managed by python poetry, I'm given the following error:

Debugger entered--Lisp error: (wrong-type-argument characterp \,)
  mapconcat(identity ("/home/username/.cache/pypoetry/virtualenvs/production-planner-py3.7//bin" "/home/username/.nvm/versions/node/v10.16.3/bin" "/home/username/.poetry/bin" "/home/username/.cargo/bin" "/home/username/.pyenv/shims" "/home/username/.poetry/bin" "/bin" "/usr/bin" "/usr/local/bin" "/home/username/.cargo/bin" "/usr/lib/jvm/java-8-openjdk" "/home/username/go/bin" "/usr/local/sbin" "/usr/lib/jvm/default/bin" "/usr/bin/site_perl" "/usr/bin/vendor_perl" "/usr/bin/core_perl" "/usr/lib/emacs/26.3/x86_64-pc-linux-gnu" "/bin" (\, "~/.pyenv/shims") (\, "~/.nvm/versions/node/v10.16.3/bin/")) ":")
  pyvenv-activate("/home/username/.cache/pypoetry/virtualenvs/production-planner-py3.7/")
  funcall-interactively(pyvenv-activate "/home/username/.cache/pypoetry/virtualenvs/production-planner-py3.7/")
  call-interactively(pyvenv-activate record nil)
  command-execute(pyvenv-activate record)
  execute-extended-command(nil "pyvenv-activate" nil)
  funcall-interactively(execute-extended-command nil "pyvenv-activate" nil)
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)

The path I've been entering is as follow:

/home/username/.cache/pypoetry/virtualenvs/my-poetry-project-py3.7

[doolio]

Have you looked at poetry.el which seems to use pyvenv.el to manage the virtual environments?