TRESTRequest ExecuteAsync und FMX ShowMessage in OnAfterExecute

[TiGü]

Alternativ kannst du auch RESTRequest.SynchronizedEvents := True; schreiben und damit schon alles gelöst haben.

Delphi-Quellcode:

    /// <summary>
    /// Specifies if Events (such as OnAfterExecute) should run in the context of the main
    /// thread (true) or in the context of an arbitrary thread - which was created by the developer or by using
    /// ExecuteAsync.
    /// </summary>
    //  <seealso cref="TCustomRESTRequest.ExecuteAsync" />
    property SynchronizedEvents: Boolean read FSynchronizedEvents write SetSynchronizedEvents default true;