Some of us prefer the Red Hat flavor of Linux to the Debian and Ubuntu distros. Although CentOS is a very stable system, you do run into issues like any other operating system. Here is an issue that I encountered on my CentOS 8.1 web server, while trying to fix something else.
Modular Dependency Problems with Perl
Running a dnf check would result in the following messages.
#dnf check Modular dependency problems: Problem 1: conflicting requests - nothing provides module(perl:5.26) needed by module perl-DBD-MySQL:4.046:8010020191114030811:073fa5fe-0.x86_64 Problem 2: conflicting requests - nothing provides module(perl:5.26) needed by module perl-DBI:1.641:8010020191113222731:16b3ab4d-0.x86_64
The fix was to run the following command:
#yum module enable perl:5.26
After this, I reran the dnf check and the dependency problems were gone.