There is a new version out of VMware vRealize Operations for Horizon 6.3.0 and VMware vRealize Operations for Published Applications 6.3.0, this just have a new build number (4661969) and (4661970).
There is a fix for some an issue caused by an expired digital signature.
I have see this error when launching the "Broker Agent Config Utility for Horizon", where I get a "unhandled exception" error in the .NET Framework, it looks like this.
This is solved in the new build.
The new build also have an new PAK file for the vRealize Operations cluster.