I was going through the steps to see if this is fixed. This is the first .NET project I've built in 5.7, so it's the first time I've seen how 5.7 presents assemblies in the Cluster tool. It's nice.

But the steps don't work!

The compiler says it can't find SYSTEM_DLL_REGEX. Looking in the Clusters window, I can see it!

I've tried a few other classes that are greyed out, for example GC, so that I could try {GC}.collect instead. Same problem!

What's going on here?