Access Denied

Are you running multisite? If so, did you network activate SWT?

Yes, it is a multisite and i activated for the whole network.

Where in your wp-config.php did you add the multisite constants?

At the very end. This is how the last 15 lines of my web.config looks like.

define('WP_ALLOW_MULTISITE', true);
define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
define('DOMAIN_CURRENT_SITE', 'mydomain.se');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

/* That's all, stop editing! Happy blogging. */

/** WordPress absolute path to the WordPress directory. */
if ( !defined('ABSPATH') )
	define('ABSPATH', dirname(__FILE__) . '/');

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');

Are you using IIS?

I’m running Linux/Apache on a shared host.

web.config is an IIS config file (I used to be a .net dev). It is not used in apache. I was asking about wp-config.php. Based on your last post I’m assuming you meant wp-config.php.

Have you completed the SWT settings so that you have a tags blog configured?

Oh! Sorry! You are right, i definitely meant wp-config.php.

I think i have completed the setup correctly. I used the default “tags”-name and checked “Post to main blog”. I just tried to alter the name to something else but that didn’t work (it didn’t update the name).

The only other thing I can suggest is try deactivating all other plugins and see if you have the error.

YES! That worked. It was this plugin that was messing with me: “Advanced Access Manager”.

It doesn’t seem to copy over my custom post type though. Is there a way to get them in there too?

See https://wpmututorials.com/plugins/sitewide-tags-update/