Check the next requirements:
Requirements help:
uploads
chmod a+w /home/hosting/prv-hosting/prv.pl/r/o/bognor/oc-content/uploads/
downloads
chmod a+w /home/hosting/prv-hosting/prv.pl/r/o/bognor/oc-content/downloads/
languages
chmod a+w /home/hosting/prv-hosting/prv.pl/r/o/bognor/oc-content/languages/
chmod a+w /home/hosting/prv-hosting/prv.pl/r/o/bognor/
oc-content/uploads
oc-content/downloads
oc-content/languages
config-sample.php