[dlibke]

When I try to run this plugin, I get the following error msg:

Status: failed

Traceback (most recent call last):
File "/Applications/Sigil.app/Contents/plugin_launchers/python/launcher.py", line 134, in launch
target_script = __import__(script_module)
File "/Users/dlibke/Library/Application Support/sigil-ebook/sigil/plugins/add-tts-engine/plugin.py", line 4, in <module>
from lxml import etree, html
ImportError: No module named lxml
Error: No module named lxml

I download version 20171105 from GitHub/Kennyl/Sigil-Ebook-Plugins/releases.
I am using Sigil 0.9.9
OSX 10.13.3 High Sierra
Python 3.6.5 for OSX 10.9 or higher

The offending line in add-tts-engine/plugin.py context follows:
#!/usr/bin/env python
#-*- coding: utf-8 -*-
import sys
from lxml import etree, html

from PyQt5.QtWidgets

My question is 'should the leading l be a . or not exist?