This is unlikely to be fixed in a short time, being a matter of software architecture and having various parties involved. I can only recommend to use less UAD, as it looks like the limit is reached faster with those plug-ins, and move some of the unused components out of the C:\Program Files\Steinberg\Cubase 8.5\Components folder (do not move Baios, exceptiondumper, mediaservice, stepdesigner and VSTPlugManager). This will allow to load a few more plug-ins, but won’t keep you running much longer I’m afraid.