Install URL is wrong

My guess is there’s a trailing slash in the URLs for home and site URL settings. While WP likes them in its permalinks, they do not belong in the settings values. If you can reach your admin settings screen, verify and correct if necessary. If not, you can correct the values directly in the database through the phpMyAdmin app. It’s usually accessed through your hosting account. Navigate to the options table of your WP database. “siteurl” and “home” values should be one for the first entries. The values should be something like https://www.example.com with nothing after the final letter.