System: CentOS Linux release 7.7.1908
Open Project Repo: openproject-ce/x86_64        Repository for opf/openproject-ce (stable/8) packages.

I had some Issues with a brocken CSS in OpenProject. So I hade a small reconfigure but now I broke everything..

sudo openproject configure
Launching installer for openproject...
Selected addons: legacy-installer postgres apache2 repositories smtp memcached openproject
[legacy-installer] ./bin/configure
[postgres] ./bin/configure
Installation is already using MySQL, skipping postgres addon.
DONE
[apache2] ./bin/configure
DONE
[repositories] ./bin/configure
DONE
[smtp] ./bin/configure
DONE
[memcached] ./bin/configure
DONE
[openproject] ./bin/configure
DONE
[legacy-installer] ./bin/preinstall
[postgres] ./bin/preinstall
INFO: autoinstall=skip. Skipping to next step.
[apache2] ./bin/preinstall
getsebool:  SELinux is disabled
setsebool:  SELinux is disabled.
Note: Forwarding request to 'systemctl enable httpd.service'.
[repositories] ./bin/preinstall
Failed to set locale, defaulting to C
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: ftp.rz.uni-frankfurt.de
 * epel: mirror.23media.com
 * extras: ftp.rrzn.uni-hannover.de
 * nux-dextop: mirror.li.nux.ro
 * remi-php72: mirror.23media.com
 * remi-safe: mirror.23media.com
 * updates: ftp.rz.uni-frankfurt.de
 * webtatic: uk.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package git.x86_64 0:1.8.3.1-20.el7 will be installed
--> Processing Dependency: perl-Git = 1.8.3.1-20.el7 for package: git-1.8.3.1-20.el7.x86_64
--> Processing Dependency: perl(Git) for package: git-1.8.3.1-20.el7.x86_64
--> Running transaction check
---> Package perl-Git.noarch 0:1.8.3.1-20.el7 will be installed
--> Processing Conflict: git2u-core-2.16.5-1.ius.el7.x86_64 conflicts git-core < 2.16.5
--> Finished Dependency Resolution
Error: git2u-core conflicts with git-1.8.3.1-20.el7.x86_64
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

I updated git already: 

# git --version

git version 2.21.0

Any hints are helpful.