Please note ... many many many support people will not open any attached microsoft files from someone they do not know. Screen shots should be shared with something other than Word docs, please.
Have viewed contents outside any wordprocessor and I see a line of text
that says: to use this plugin you will need php-fileinfo extension.
IF linux, one can check for that extension via command line:
php -m |grep fileinfo
IF the above returns just 'fileinfo' your server does have it loaded.
IF the above returns nothing, fileinfo is not installed.
Install the extension.
The test_turnitin.docx image extracted is too dark to see anything.
TurnItIn is commercial. Suggest contacting someone at:
http://turnitin.com/en_us/support
'spirit of sharing', Ken