When you follow the instructions to run plweb, you get:
?- pack_install(googleclient).
% Contacting server at http://www.swi-prolog.org/pack/query ... ok
Install googleclient@0.5.2 from https://github.com/JanWielemaker/googleclient/archive/V0.5.2.zip Y/n?
% Contacting server at http://www.swi-prolog.org/pack/query ...
ERROR: Server reported the following error:
ERROR: Content of 'https://github.com/JanWielemaker/googleclient/archive/V0.5.2.zip' has changed.
Pack may be compromised.
When you follow the instructions to run
plweb
, you get: