xml.etree.ElementTree.ParseError: not well-formed (invalid token): line 8, column 73 code example
Example: xml.etree.elementtree.parseerror: not well-formed (invalid token)
It seems to complain about \x08 you will need to escape that.
Edit:
Or you can have the parser ignore the errors using recover
from lxml import etree
parser = etree.XMLParser(recover=True)
etree.fromstring(xmlstring, parser=parser)