fckeditor and joomla - error message fopen()

Warning: fopen(): URL file-access is disabled in the server configuration in /home/content/mambots/editors/fckeditor.php on line 148

Warning: fopen(http://www..../templates/rt_mobius/css/editor_css.css): failed to open stream: no suitable wrapper could be found in /home/content/mambots/editors/fckeditor.php on line 148

Warning: file(): URL file-access is disabled in the server configuration in /home/content/mambots/editors/fckeditor.php on line 149

Warning: file(http://www...../templates/rt_mobius/css/editor_css.css): failed to open stream: no suitable wrapper could be found in /home/content/mambots/editors/fckeditor.php on line 149

In the event you haven't found a solution, you may want to unpublish all other editor mambots, as this evidently solved the problem for me and is working like a charm without the errors.