…be SURE you’re:
1. logging in to your dashboard,
2. clicking on “Users”,
3. then click on “edit” to the right of your user name on the right side under “actions”
4. under “edit user” there should be something that says “Use the visual editor when writing”
5. Is that checked? If not, check it.
I had the same problem everyone is mentioning here, and that resolved it – here is a screenshot of where it is.
Hope this helps someone –
hank