Welcome to the forums,
As you're getting exact same issue - did you try the two solutions suggested above?
1) check permissions to /data/ directory and all subfolders. While in epesi main dir, try using:
chmod -R 755 data
2) After that update theme files. To do this, go to
http://<your_epesi_path>/admin/ and select "3. Rebuild Common cache & default theme"
If that doesn't work, you can also try chmod -R 777 data, in case file owner is invalid.
Please tell us if this helps.
Kind regards,
Arek
