{nav}# open Admin Console
# go to {nav Configuration > Website > Themes} section
# remove value from `Stylesheet File` field while editing current theme
  # Go to Adm.console Configuration-># save changes
# go to {nav Catalog & Website->Themes > Browse Website} section.
  # Clean "Stylesheet File" field while editing current theme, save theme.# select `Content Mode` (in top frame)
# confirm that:
  # Go to Browse Website, select Content Mode,* content blocks opens on editing
 confirm that content blocks opens on edit* the CKEditor is displayed and have FCK-editor controls inside.
is operational