Sorry, you must have Designer access to be able to create or delete a full-text index
What happened
You tried to create an index for a full-text search. You chose File > Application > Properties, clicked the Full Text tab, and clicked Create Index or Delete Index, but you don't have at least Designer access to the selected application.
What you can do
Ask the application manager to give you a higher level of access to the application, or to create or delete the index for you.