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With C+Builder 10.4 I can't use event in my custom components. When I place my components inside a form, I receive the error message in the picture ("property and method ... are not compatible). I use the "legacy compiler" for both projects, components and application (VCL).
Component package has only RTL requires.
The complete example to reproduce the problem is here: https://app.box.com/s/426h1kpxrn4f89ta7bfbs2i6nfwmao8h
The same code works well with other version of C++Builder.
I've installed 10.4 + patch 1+2 in a new PC without old C++Builder.
The problem is still present in 10.4 patch 3.