Hi,
How to fix canonical issues?
Use Canonical tag in header section
Add this code in your .htacc file to fix canonical issues
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ <!-- m --><a class="postlink" href="http://www">http://www</a><!-- m -->.%{HTTP_HOST}/$1 [R=301,L]
To fix the cannonical issue you should make a 301 redirection for your website url.
You should use Canonical tag in header section.
There is tag called canonical tag that you can use.