症状

After creating invalid HTML, the Save button or the Cancel button are not visible on the Edit Custom HTML Page to revert the change.

原因

Invalid syntax or incompatible customization would lead to the behavior mentioned.

ソリューション

In edit mode:

1. Clear/remove the appended/customized values

2. Edit the URL to:

   http://<your Domain URL>/admin/doeditcustomhtml.action
   

   The action above will manually execute the Save operation and hence revert the layout to default.