Hey everyone,
I recently upgraded to 2.8 and encountered the exact problem…no tinymce editor!
Here’s the fix I used:
1. Download the latest version of WP to your desktop
2. Extract all the files
3. Open up your site using FTP
4. Locate wp-includes>>>js>>>tinymce
5. Delete the the tinymce folder
6. Create a new directory named tinymce. Same name same location as the old one
6. Locate the tinymce folder on your desktop
7. Upload all it’s contents to the new tinymce folder you created
You should be good to go. I tried everything else above but nothing worked for me except replacing the existing files.
Cheers