Just this. I get empty space with this options. You can check it here: https://lamentiraestaahifuera.com/forum/
Try to fix first this issue:
https://lamentiraestaahifuera.com/forum/:129 6" role="listitem"> <anonymous> https://lamentiraestaahifuera.com/forum/ :1296
It's a conflict with JetPack plugin. I wouldn't like to deactivate JetPack. How can I proceed?
I have found the incompatibility. The problem is related to the modules "Social", "Sharing" and "contact form" (at least I think so).
https://lamentiraestaahifuera.com/wp-admin/admin.php?page=jetpack_modules (You will have no access)
With these modules disabled, it works (the login and registration links, I mean). But, if I need to activate "Sharing" for posting automatically an article at all the social networks, Jetpack ask me to connect my account, and then the forum stops working, even if I deactivate the "Sharing" module again.
This is something annoying. I have open a request at jetpack support forum too. I can live with this inconvenient, and post manually my articles at facebook and twitter, and I have installed other plugins for sharing and contact form functionalities, but I think it should be fixed.
Thank you
As a reference: this is an example of when the login link works:
And this is an example when it don't: