Ubuntu 20.04 - Any tips? AttributeError: module 'acme.challenges' has no attribute 'TLSSNI01'

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For a very fragile workaround, you can edit /usr/lib/python3/dist-packages/certbot_nginx/configurator.py and replace

return [challenges.HTTP01, challenges.TLSSNI01]

with

return [challenges.HTTP01]

(or you… can use the webroot plugin)

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