Checklist

• I'm reporting a bug in Maigret functionality
• I've checked for similar bug reports including closed ones
• I've checked for pull requests that attempt to fix this bug

Description

Info about Maigret version you are running and environment (--version, operation system, ISP provuder):

• maigret 0.4.3
• Socid-extractor: 0.0.23
• Aiohttp: 3.8.1
• Requests: 2.27.1
• Python: 3.9.10
• Windows 11 x64 22H2 22593.1

How to reproduce this bug (commandline options / conditions):
generate xmind output

Maigret does not output a valid XMind file, attempting to open results in the below error

Found a potentially related PR from 2021 #161