H2505 'Self' is uninitialized. An inherited constructor must be called before entering a try block (Delphi)

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A constructor must always call an inherited constructor before it may access or initialize any inherited class members (such as specific exception handling). The compiler generates an error if your constructor code does not call the inherited constructor (a valid situation in Delphi for Win32), but it is important to examine your constructors to make sure that you do not access any inherited class fields, directly or indirectly, before the call to the inherited constructor.

Note: A constructor can initialize fields from its own class, prior to calling the inherited constructor.