I also failed on Windows 10 with CitrusPerl 5.16.3 so I tried the latest version 5.24.1 which came with LWP::UserAgent 6.26. I then upgraded to 6.38 with no problem.

D:\citrusperl-standard-52401-msw-x64-031\perl\bin>cpanm LWP::UserAgent
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^\#\s+PREREQ_PM => { <-- HERE \s*(.*?)\s*}/ at /loader/0x6728d0/App/cpan
minus/script.pm line 1556.
--> Working on LWP::UserAgent
Fetching http://search.cpan.org/CPAN/authors/id/O/OA/OALDERS/libwww-perl-6.38.tar.gz ... OK
Configuring libwww-perl-6.38 ... OK
==> Found dependencies: Net::HTTP
--> Working on Net::HTTP
Fetching http://search.cpan.org/CPAN/authors/id/O/OA/OALDERS/Net-HTTP-6.18.tar.gz ... OK
Configuring Net-HTTP-6.18 ... OK
Building and testing Net-HTTP-6.18 ... OK
Successfully installed Net-HTTP-6.18 (upgraded from 6.13)
Building and testing libwww-perl-6.38 ... OK
Successfully installed libwww-perl-6.38 (upgraded from 6.26)
2 distributions installed
poj

In reply to Re: Upgrading LWP::UserAgent by poj
in thread Upgrading LWP::UserAgent by Stamm

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