I've recently upgraded vRA from 6.0.1 to 6.1, and as part of that process I ran into an issue loading the vCACCAFE plugin for vRO where it remained in "will be imported at next reload" state. I eventually figured out that this was resolved by upgrading my Orchestrator instance from 5.5.1 to 5.5.2.
Today i went ahead with the 6.2 upgrade, and on importing the 6.2 version of the vRO plugin I ran into the same issue, and have thus far been unable to resolve it. In catalina.out I can see tons of reference errors while it attempts to load the plugin, and I also noticed that Orchestrator appears to be bundled with a separate library called NNN-cafe61.lib which I suspect might be a depencency for VCACCAFE 6.1 that needs an update for 6.2
Since vRA is bundled with vRO 6.0 I figured there might be some undiscovered issues with the standalone 5.2.2?
Anyhow, I expect that I'll need to downgrade my package to 6.1 to get vRO working again but that's okay.