Links to plugin files not resolving

Has anyone seen an issue where links to plugin files can’t be resolved and results in 404 errors?

For example, I have a plugin that drops a page template into the active theme directory, and this template file references a reset.css file. The reset.css file is found in the /wp-contet/plugins/[plugin-name]/templates folder.

Everything is fine until you create a new page with the template and then view the page; the layout is wrong. When viewing the source, I see that the link to the reset.css file is correct (https://site.com/wp-content/plugins/%5Bplugin-name%5D/templates/reset.css), but when I put that URL in the browser it results in a “page not found” error.

I’ve tried deactivating plugins, checked permissions, and turned on the debug log, but so far nothing has helped.

Any ideas?