You should be good to proceed.
Thanks for pointing out the missing backslash. I added it.
It seems the libsql-abstract-classic-perl package is not available on Ubuntu 22.04. Largely because it isn't needed. As I said, the version of SQL::Abstract in the repositories for Ubuntu will work fine, so you didn't need to install SQL::Abstract::Classic. The SQL::Abstract::Class library is just provided for applications like WeBWorK that need compatibility with the older versions of SQL::Abstract when a newer version is installed.
Thanks for pointing out the missing backslash. I added it.
It seems the libsql-abstract-classic-perl package is not available on Ubuntu 22.04. Largely because it isn't needed. As I said, the version of SQL::Abstract in the repositories for Ubuntu will work fine, so you didn't need to install SQL::Abstract::Classic. The SQL::Abstract::Class library is just provided for applications like WeBWorK that need compatibility with the older versions of SQL::Abstract when a newer version is installed.