CentOS 8 isn’t supported since it moved to a rolling release model. We support RHEL, Rocky, and AlmaLinux 8 only I’m afraid.
# dnf upgrade ... Last metadata expiration check: 2:24:21 ago on Sun 28 May 2023 11:13:36 AM GMT. Error: Problem 1: package pgadmin4-web-7.1-1.el8.noarch requires python39-mod_wsgi, but none of the providers can be installed - package python39-mod_wsgi-4.7.1-4.module_el8.4.0+680+7b309a77.x86_64 conflicts with python3-mod_wsgi provided by python3-mo d_wsgi-4.6.4-5.el8.x86_64 - package python39-mod_wsgi-4.7.1-4.module_el8.5.0+738+dc19af12.x86_64 conflicts with python3-mod_wsgi provided by python3-mo d_wsgi-4.6.4-5.el8.x86_64 - package python39-mod_wsgi-4.7.1-5.module_el8.7.0+1213+291b6551.x86_64 conflicts with python3-mod_wsgi provided by python3-m od_wsgi-4.6.4-5.el8.x86_64 - cannot install the best update candidate for package python3-mod_wsgi-4.6.4-5.el8.x86_64 - cannot install the best update candidate for package pgadmin4-web-6.21-1.el8.noarch Problem 2: package pgadmin4-web-7.1-1.el8.noarch requires python39-mod_wsgi, but none of the providers can be installed - package python39-mod_wsgi-4.7.1-4.module_el8.4.0+680+7b309a77.x86_64 conflicts with python3-mod_wsgi provided by python3-mo d_wsgi-4.6.4-5.el8.x86_64 - package python39-mod_wsgi-4.7.1-4.module_el8.5.0+738+dc19af12.x86_64 conflicts with python3-mod_wsgi provided by python3-mo d_wsgi-4.6.4-5.el8.x86_64 - package python39-mod_wsgi-4.7.1-5.module_el8.7.0+1213+291b6551.x86_64 conflicts with python3-mod_wsgi provided by python3-m od_wsgi-4.6.4-5.el8.x86_64 - problem with installed package python3-mod_wsgi-4.6.4-5.el8.x86_64 - problem with installed package pgadmin4-web-6.21-1.el8.noarch - package pgadmin4-web-6.21-1.el8.noarch requires pgadmin4-server = 6.21, but none of the providers can be installed - package pgadmin4-web-7.0-1.el8.noarch requires pgadmin4-server = 7.0, but none of the providers can be installed - cannot install both pgadmin4-server-7.1-1.el8.x86_64 and pgadmin4-server-6.21-1.el8.x86_64 - cannot install both pgadmin4-server-7.1-1.el8.x86_64 and pgadmin4-server-7.0-1.el8.x86_64 - cannot install the best update candidate for package pgadmin4-server-6.21-1.el8.x86_64 (try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)