I have civicrm 4.7.27 installed on Wordpress 4.9.1 Everything was fine yesterday when I created new contribution pages. Then this morning I noticed that the Introductory and Footer message textareas of the Title and Settings tab of the Contribution pages are not loading the WYSIWYG Editor. As far as I can tell, this is only happening in this area, and not any other area that relies on ckeditor/WYSIWYG, but I am concerned that because this came out of nowhere, that it will show up in other parts of the install. Does anyone know what is going on? Is it possibly a known bug with 4.7.27? See screen shot for error messages.