Well, I don't really know, what else to add. This is the complete code, except, I also have a shebang at the top: 
#!/usr/bin/env perl

[download]
perl:
5, version 22, subversion 1 (v5.22.1) built for x86_64-linux-gnu-thread-multi
OS:
Ubuntu 16.04.1 LTS; x86_64

Once, I've wrote that code, I've tested it and it didn't work, so that's as far, as I've got to.
I only tried XPaths: '/' and '/*', on different (working and 404 urls) - same result with the same error.

After that, I thought, that I have some lib dependency problem, so I tried to install the libs and related sublibs , mentioned in error message and, some of them said, that they were up to date, some updated, but the same error after update.
Now I'm trying to upgrade all of the libs with cpan util's command 'upgrade' to see if it helps, but it's taking a long time. I don't have a very fast inet.
Perhaps, I have some library corrupted.

In reply to Re^2: Error with executing findvalues method on HTML::TreeBuilder::XPath by igoryonya
in thread Error with executing findvalues method on HTML::TreeBuilder::XPath by igoryonya

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