Weird error message on loading

I'm getting a strange error message whenever Resolve loads (I'm using the latest version, but this message has persisted for quite some time).

"one or more open FX plugins are not available"

I've checked the list of plugins and Open FX list in the app preferences and all are showing as having loaded successfully, so I'm not sure how to find out which plugins it is referring to?

If you are using the Free version it may be referring to the fact that some of the plugins will only work in the Studio version, though I've never seen that message myself. Studio only plugins in the Free version will show a large watermark and encourage you to upgrade.