Hi,
I am another user who just discovered and am interested in the plugin, and I also noticed that the add game button was not working. It seems to be due to the following error:
PHP Fatal error: Uncaught exception ‘Unirest\Exception’ with message ‘SSL certificate problem: unable to get local issuer certificate’ in
…
wp-content\plugins\wpgamelist\wpgamelist.php(763): Unirest\Request::get(‘https://igdbcom…’, Array)
In other words, it might be because igdb has some kind of problem with their SSL, or the code in this plugin that handles SSL is out of date (not sure which, haven’t investigated). Anyway, if you add the following line just before, at around 758 of the wpgamelist.php file, it will disable SSL checking for Unirest calls, which is an effective but marginally less secure workaround:
Unirest\Request::verifyPeer(false);
Good luck with the site! Maybe we can help each other out if we run into more problems ??