Patrick Johanneson

Your .htaccess file looks like the stock WP Multisite one. Have you tried disabling all your plugins and switching to a default WP theme (eg, Twenty Fifteen) to see if the issue persists?

Also: I tried going to www.thefashionnerd.com and thefashionnerd.com, and both times your site loaded correctly (no extra w prepended to the URL). Could it be a problem with your computer?

Check your wp-config.php file for a typo. There should be a line that reads:

define('DOMAIN_CURRENT_SITE', '[your site's URL]' );

Make sure that [your site's URL] is correctly defined. In your case it should be thefashionnerd.com.

You’ll probably need to double-check your database tables, too. Unfortunately, updating the domain in Multisite is a bit of a pain. Fortunately, there are some good resources out there.

See, for example, https://wpengine.com/support/how-to-change-a-multi-site-primary-domain/ .

Also, https://codex.www.ads-software.com/Moving_WordPress#Moving_WordPress_Multisite has some direction, though it sort of assumes you’re well-versed in manually editing your MySQL database.

When you log in to your WordPress installation, and go to the /wp-admin page, please click on Settings and then Reading. You should see a screen like the one displayed here:

https://codex.www.ads-software.com/Creating_a_Static_Front_Page#WordPress_Static_Front_Page_Process

What is selected on your site for Front page displays?

You may have more luck asking in the WooCommerce support forum.

I’m glad you found the solution.

This seems like it should be a question in a plugin’s support forum. Do you know what plugin your site uses for ecommerce?

Is the site in question set up to use a page as its home page, or the most recent posts?

On your sites’ wp-admin screens, go to Settings->Permalinks and click Save Changes (even if you haven’t made any changes). Does that help?

Instead of using $wpdb->prefix, you can use $wpdb->base_prefix.

From the Codex page on the wpdb class:

$base_prefix
The original prefix as defined in wp-config.php. For multi-site: Use if you want to get the prefix without the blog number appended.

(Emphasis added)

Are you still experiencing the error, or have you resolved your issue?

Excellent. Feel free to mark this thread Resolved using the tools on the right-hand side.

What are the permissions on your uploads directory? Also, is it /wp-content/uploads or /uploads?

Have you triple-checked that the MySQL username and password in your wp-config.php file are correct?

It sounds from your original post like your host disabled Multisite entirely. Are you sure you’ve still got a WP Multisite network running?

This line especially — //define('MULTISITE', true); — looks like you may not have Multiste currently running.

Does SiteGround allow Multisite installs?

Plugins that are network activated won’t appear in the sites’ Plugin lists. They’ll only show up on the Network Admin plugin list.

If you need a plugin activated on all sites but one, then I believe you’ll need to activate it on each individual site. You can’t network activate it and then turn it off on one site.