Are you running a debug version of the plug-in? Without a debugger attached you’re not going to get much information about what’s caused the crash.
Access violation reading location 0xFFFFFFFFFFFFFFFF implies that something hasn’t been properly initialised. If you’re running the AudioPluginHost with a debugger attached it’ll show a callstack of where the crashed occured that should tell you if it’s a problem with the plug-in or with the host.
Even if they can fix it, I don’t think you will have much joy with this kind of plugin (injecting beats/samples) without a PlayHead, which the AudioPluginHost doesn’t provide.
That’s my hunch why it crashes, they might not check for the absence of a PlayHead, since there is nothing useful to do for that plugin (there are better options than crashing though )