I cannot see the Planetstyles extension in the Extension manager even though I followed the steps
Uploading the extension files
1.Download Milk Theme
2.Locate folder “milk.zip” and extract to your desktop
3.Open the folder corresponding to the phpBB version you’re using
4.Open folder "2. Extension Files"
5.Using either FTP or a File Manager, upload the “planetstyles” folder to: /yourdomain.com/phpBB/ext/