perl - perldoc shows "Can't find any loadable formatter class in Pod" error?

Question

I am running this:

$ perldoc Bio::EnsEMBL::Slice

Can't find any loadable formatter class in Pod::Perldoc::Toman Pod::Perldoc::Toman Pod::Perldoc::ToMan Pod::Perldoc::ToMAN Pod::Simple::man Pod::Simple::man Pod::Simple::Man Pod::Simple::MAN Pod::man Pod::man Pod::Man Pod::MAN Pod::Perldoc::Totext Pod::Perldoc::Totext Pod::Perldoc::ToText Pod::Perldoc::ToTEXT Pod::Simple::text Pod::Simple::text Pod::Simple::Text Pod::Simple::TEXT Pod::text Pod::text Pod::Text Pod::TEXT Pod::Perldoc::ToPod?!
Aborting
 at /usr/bin/perldoc line 10.

and get this above error. I have installed the ensembl properly but perldoc is showing error. Can you give your suggestions in resolving this issue? Thanks!