Hi, avocadomagazine!
It looks as though an old version of the plugin stylesheet is being included inline. If you’ve already cleared or disabled caching plugins briefly to rule that out, it’s worth asking your host if they’re using any other caching solutions. In particular, it’s worth checking:
1. As you appear to be on Dreamhost, try installing the Varnish HTTP Purge plugin, and then clicking the “Purge Varnish” link that appears at the top of your admin bar. https://www.ads-software.com/plugins/varnish-http-purge/
2. If you or your host is using Cloudflare, it is also worth clearing the Cloudflare cache. https://support.cloudflare.com/hc/en-us/articles/200169246-How-do-I-purge-my-cache-
If you still have trouble after contacting your host to confirm that all inlined styles have been updated to display the latest versions of plugins’ stylesheets, feel free to follow-up here. (I’m about to log off for the evening, but will be sure to follow-up tomorrow if you reply.)