You see this message due one (or more) of the following reasons:
1. You have not enabled your 'Shoppica Theme CP' module. Please, go to admin panel, enter Extensions->Modules and change the status of 'Shoppica Theme CP' to `enabled`.
2. You have not properly updated your index.php file. It should contain these two lines (near the end):
For more information about the theme installation, please read carefully the Shoppica Extended Documentation.
If you think you've made everything according to the installation instructions and this message continues to appear, please contact the support.