Solution 1 :
Step 1 : Go to your WP-ADMIN–>Settings–>Permalink
Step 2 : Chose URL structure and click and save button ,then issue will resolve.
Solution 2 : If still you are facing same issue we need to do below changes in .htaccess file.
Add below content in .htaccess file
#BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress
All the Best
