Category Pretty_Permalinks 404 – Default Permalinks OK

What’s your .htaccess look like?

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]
# END WordPress

Here’s the site: https://ratehouse.ca/category/blog/

Are there any POSTS in the blog category? Can you link to one?

Here’s one: https://ratehouse.ca/2013/06/pre-approved-mortgages-why-it-is-necessary/

Thanks for your help

I’m having the same issue after updating.

Had a stray flush_rewrite_rules(); in functions.php