I just noticed I couldn’t access HA over the internal URL anymore in the companion app and “Add Integration” buttons also didn’t work.
I fixed these issues by entering the Duck DNS external URL where the internal URL is supposed to be in the companion app and entering the new https internal URL in the my.home-assistant.io page.
Despite those problems being solved, I became a little worried, considering that these were issues the guy who made the tutorial I followed didn’t mention.
What are your experiences with this? Could there be further issues down the line?