joivmaco

I forgot to mention that there should not be any white space or anything after the ?> closing tags. Remove it, save it and now it should work.

I found the error in a plugin file: /wp-content/plugins/addthis-social-sign-in/includes/OAuth.php

If you edit the code there is white space after the ?> closing tag at the end of the code. This fixed it for me and I was getting several errors.

I found the error in a plugin file: /wp-content/plugins/addthis-social-sign-in/includes/OAuth.php

If you edit the code there is white space after the ?> closing tag at the end of the code. This fixed it for me and I was getting several errors.