Trying to install with this guide Installing server version from RPM/DEB packages using the provided script - ONLYOFFICE
Here is the error:
# bash install-Debian.sh
Hit:1 http://download.onlyoffice.com/repo/debian squeeze InRelease
Hit:2 http://deb.debian.org/debian bullseye InRelease
Hit:3 https://d2nlctn12v279m.cloudfront.net/repo/mono/ubuntu xenial InRelease
Hit:4 http://deb.debian.org/debian bullseye-updates InRelease
Hit:5 https://deb.nodesource.com/node_12.x bullseye InRelease
Hit:6 https://artifacts.elastic.co/packages/7.x/apt stable InRelease
Hit:7 http://security.debian.org/debian-security bullseye-security InRelease
Ign:8 https://download.mono-project.com/repo/debian stable-bullseye/snapshots/6.8.0.123 InRelease
Hit:9 http://ftp.uk.debian.org/debian bullseye InRelease
Err:10 https://download.mono-project.com/repo/debian stable-bullseye/snapshots/6.8.0.123 Release
404 Not Found [IP: 152.199.19.161 443]
Reading package lists... Done
E: The repository 'https://download.mono-project.com/repo/debian stable-bullseye/snapshots/6.8.0.123 Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Using debian-11.1.0-amd64.