Why is CSS not working in production?

In both our development and testing environments, CSS is applying correctly, and in production, before pushing our application to production earlier today, CSS was applying correctly, but now, none of our CSS in production works. When we open service center in production, the CSS works in the preview, and we have already tried republishing and pushing again from test to production. We have already checked dependencies and done quite a bit of troubleshooting. Any reason our testing environment would be different when we just published? When we inspect the page, we still see the CSS classes being called. This module is in traditional.

FYI the ticketing system no longer works and has been down for quite a while.

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The issue was because our site has an SEO URL that did not have a slash at the end of it. Very strange.

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