I took the path here: https://metacpan.org/dist/Dancer/view/lib/Dancer/Deployment.pod#Running-from-Apache-with-Plack but it refuses to start up.

The error complains about List::Util not exporting certain methods:

Error while loading /path/to/app/bin/app.psgi: "pairmap" is not exported by the List::Util module\n "pairgrep" is not exported by the List::Util module

Which seems to say to me that it's accessing a very old List::Util somehow?

The app works:

and a simple Perl script with use List::Util qw( pairmap ); works fine. The version of Perl used by app.psgi is fine with it. I asked CPAN to upgrade List::Util but it said it was current. Plack::Handler::Apache2 seems to be current but doesn't seem to export a $VERSION so that's moot.

Which perl and which libraries is my Apache (2.4.7) trying to use?

In reply to Dancer app works until I run it with Plack::Handler::Apache2 by LittleJack

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