** Using WeBWorK **

New install of 2.12 on Ubuntu 16.04.
When selecting a Subject menu item from the OPL the pop-up error message is

Warning messages

Error messages

Can't call method "ssl_opts" on an undefined value at /usr/share/perl5/SOAP/Lite.pm line 484.

Call stack

The information below can help locate the source of the problem.

in SOAP::Transport::__ANON__ called at line 280 of /opt/webwork/webwork2/lib/WebworkClient.pm
in WebworkClient::xmlrpcCall called at line 336 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/instructorXMLHandler.pm
in WeBWorK::ContentGenerator::instructorXMLHandler::pre_header_initialize called at line 214 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator.pm
in WeBWorK::ContentGenerator::go called at line 382 of /opt/webwork/webwork2/lib/WeBWorK.pm

If I click the 'go away' box on the error message I am then able to view the problems. I have run check_modules.pl and SOAP::Lite seems to be installed, I did note something about JSON
a snippet of check_modules.pl\
IO::File found and loaded
Iterator found and loaded
Iterator::Util found and loaded
Prototype mismatch: sub main::from_json: none vs ($@) at (eval 111) line 2.
Prototype mismatch: sub main::to_json: none vs ($@) at (eval 111) line 2.
JSON found and loaded
Locale::Maketext::Lexicon found and loaded
Locale::Maketext::Simple found and loaded

I'm at a loss here. Thanks in advance for any help.

This appears also for for chapter and section menu items, but did not appear for other items.