Could be one of your plugins. Try clearing cache from cache plugin.
to find out if the code comes from a plugin or from any edited theme files, try:
– temporarily switch to the default theme Twenty Fifteen; if the line disappears, it could probably be from an edited haeder.php of your theme.
– temporarily de-activate all plugins; if the line disappears, re-activate one plugin at a time and check inbetween to see which plugin is adding the code. then double-check the entries and settings of that plugin, or post in the plugin’s support forum.
I fixed it! It was the “SEO Spotlight Ultimate” plugin causing a problem. I deactivated several additional plugins that did not seem necessary, but it seems to be loading slowly now.
