If, in Windows, when using the Windows VST versions of Flux:: plug-ins (Cubase, Nuendo, Sonar etc.) you experience problems with white/blank and other strange looking GUIs. Missing text, strange fonts or any other GUI problems, a common problem is that the plug-in .dll files have been moved manually from the original VST-folder used in the plug-in installation.
If this is the case, you have to uninstall the plug-ins, remove any files that were moved manually and hence not removed in the uninstallation, and finally re-install the plug-ins and instead change the plug-in path during the installation.
More information about moving VST plug-in files (Windows Only)