The module loading path, most likely $ENV{PERL5LIB}, shows the path to one Perl version while you are running a different Perl version. Set up $ENV{PERL5LIB} to only contain paths for the Perl version you're actually running.

In reply to Re: Devel::NYTProf: "undefined symbol: PL_stack_sp" error by Corion
in thread Devel::NYTProf: "undefined symbol: PL_stack_sp" error by Special_K

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