Software error:

Validation failed for type named Num declared in package Specio::Library::Builtins (/usr/share/perl5/Specio/Library/Builtins.pm) at line 139 in sub named (eval) with value undef

Trace begun at Specio::Exception->new line 57
Specio::Exception::throw('Specio::Exception', 'message', 'Validation failed for type named Num declared in package Specio::Library::Builtins (/usr/share/perl5/Specio/Library/Builtins.pm) at line 139 in sub named (eval) with value undef', 'type', 'Specio::Constraint::Simple=HASH(0x55bc45835e70)', 'value', undef) called at (eval 201) line 88
DateTime::_check_from_epoch_params('epoch', undef) called at /usr/lib/x86_64-linux-gnu/perl5/5.26/DateTime.pm line 481
DateTime::from_epoch('DateTime', 'epoch', undef) called at /home/mark/www/hscch/cgi-bin/webcam.pl line 157
main::webcam at /home/mark/www/hscch/cgi-bin/webcam.pl line 36
main::start at /home/mark/www/hscch/cgi-bin/webcam.pl line 26

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