WordPress Speed Up Service | WordPress Website Maintenance Packages Cookies are blocked due to unexpected output., by jmcp I’m unable to log into my own site. On the login screen, I get the following error: Cookies are blocked due to unexpected output I’ve seen a few other posts like this already. I’ve renamed all of the plugin folders to disable them, but nothing changed. I only have the one theme installed. If I rename that folder, the site just turns completely white. I don’t know what else to try. Can anyone suggest anything else? I’m not comfortable going into the files, but will do it if someone can tell me exactly what to do. Thanks! Cookies are blocked due to unexpected output.