I created a website using Wordpress on a local server and the migrated it to an online server both manually and using the plugin Duplicator. All went fine and I have the same configuration of the localhost site, with all the pages set correctly. My problem is this: when I open my Website I continue to see "Page not found" and 404 errors even it the page exists and I can see it in the Wordpress page settings. In addition when I enter my domain a "/wp/" is added at the end, so it's like "www.mydomain.com/wp/" and I get the "Page not found" errors. How can I resolve this issue? Thank you so much in advance!
First, try what @freejack said. Replace the siteurl and home from wp-options table in the database. Then delete the.HTACCESS file from the root folder & try to run the site. Once the site runs, refresh the permalink and perform a search-replace on the database.