May be look at the error output before and after the text in post #1.
# cpan
cpan >
install RT::Action::SLA
.... Will show a different text.
So will 'make test', when it is run in a manual build :
cd RT-Extension-SLA-0.03/ && perl Makefile.PL && make && make test
http://www.cpan.dk/authors/id/R/RU/R...LA-0.03.tar.gz
And an advantage with the manual build is that you can do # make install
and then find out, if things actually work.
Another thing : Some of the perl packages available from the repositories
with # 'yum install' did not pass all tests. But you won't see that, when
they are installed as rpm packages.
About test : May be a "time module" for the tests is missing ?
( Time::Business, Business::Hours etc. ? )
..