Hi @asmecher
I’m not using that setting - changing it didn’t have any effect on my site, but I turned on protocol-relative URLs using this workaround that modifies line 157 of /lib/pkp/classes/core/PKPRequest.inc.php in order to get OJS to work with apache and an nginx reverse proxy.
I guess the result is that some plugins are not seeing the protocol when they generate URLs and this is causing issues if the URL is needed for something external.