Server error after re-uploading site

Hi,

I've made some changes to a perch site (added the shop app), but after re-uploading all files and the database, the home page produces a blank page. I can log into admin, but once there that is also blank. I'm getting the following server error:

PHP Parse error: syntax error, unexpected '[' in /home/sites/cookslaneherbs.co.uk/public_html/admin/addons/apps/perch_shop/admin.php on line 7: /home/sites/cookslaneherbs.co.uk/public_html/admin/index.php

Do you know what could be causing this?

Many thanks, Alex