WordPress Permalinks 404 error

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Could you try to replace .htaccess with the following? It looks like you’ve installed WordPress in a subfolder called solutions.

# BEGIN WordPress
RewriteEngine On
RewriteBase /solutions/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /solutions/index.php [L]
# END WordPress