Compile error, impossible to create .dll

[daniel]

It is the other way round, VST3 is included, the Legacy VST is only available for people, who had a countersigned license agreement with Steinberg.
It is no longer possible, to start legacy VST development now.
See this thread:

The removal of JUCE’s embedded VST2 SDK

Hello JUCE users, Following Steinberg’s announcement that they are removing the VST2 components from the VST3 SDK https://www.steinberg.net/en/newsandevents/news/newsdetail/article/vst-3611-sdk-now-available-4906.html the JUCE team is also removing the VST2 header files from the JUCE repo. As of this commit https://github.com/WeAreROLI/JUCE/commit/a3566b8c1edac29997490143982cd2b2eb089ffa it is no longer possible to create VST2 plug-ins using JUCE’s embedded VST2 SDK. If you are an existing…