This script cannot currently write to the directory:
/var/www/vhosts/byoshower.co.uk/httpdocs/shop
This directory needs to have permissions set so that it is writable via the webserver process that executes PHP in order to use this installer script. To correct the permissions for this directory in order to use this installer script, adjust permissions as follows:
For Unix/Linux servers, use your FTP client or SSH shell to 'chmod' the directory above to a writable level. This level is typically 'chmod 777'.
For Windows servers, contact your server administrator and request that they set permissions on the directory above to 'Full Control' for the process that PHP runs under. This needs to be done via Windows Explorer, not the IIS Control Panel.
Once permissions have been adjusted, access this installer script again.