Hello and welcome to JustAnswer~! My name is Travis and I would like to assist you with your question.
Is this on your home computer?
If you are using word at home, try finding the normal.dotm in C:\Users\%username%\AppData\Roaming\Microsoft\Templates Close, word and rename normal.dotm to normal.old. Open word and it will create a new dotm file. Then try creating some autotext entries and see if they are saved.
I did that already. no good
just had a guy in the building, go into my computer to the Word- file- options- add ins,and he removed something to do with the PDF add-in and now I can save auto text. problem solved.