@sebastian-roth See above post, sorry, replied to the OP instead of you.
Unfortunately the install still failed. I thought this might just be a bug with my particular server, so I set up a brand new server just for Fog, using Debian 11, but still got this exact error.
OK
* Backing up user reports.....................................Done
* Stopping web service........................................Failed!
OK
* Setting up Apache and PHP files.............................Failed
###########################################
# #
# PHP Failed to install properly #
# #
###########################################
Could not find /etc/php//fpm/php.ini!
You can view the error logs in this gist:
https://gist.github.com/asheroto/c10799f8ef3ca9ff666853c9ef196642