Software error:

List::Util object version 1.21 does not match bootstrap parameter 1.35 at /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/XSLoader.pm line 94.
Compilation failed in require at /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/Scalar/Util.pm line 13.
Compilation failed in require at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/Date/Simple.pm line 51.
BEGIN failed--compilation aborted at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/Date/Simple.pm line 51.
Compilation failed in require at display_month.cgi line 19.
BEGIN failed--compilation aborted at display_month.cgi line 19.

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