Hi, I'm sorry if I'm not answering whether I'm using fpGUI widgetset because I don't know the difference between FGUI's..
When your project is a graphic application you may use a widgetset that will give you components ready to use like, forms, buttons, grid, images,...
Lazarus IDE has his own widgetset called LCL who use other third party widgetset like Gtk, Qt, Carbon, Win32, ...
There is the components palette with the different component that LCL offer.
But there are also other widgetset compatible with FPC, like fpGUI or MSEgui that are "pure" pascal widgetset that dont use other third party widgetset.
And the great deal of BGRABitmap is that it is compatible also with those widgetset.
By the way, I tried doing what you said, I removed the BGRABitmapPack4fpGUI 9.9 in the project inspector and it works! Thank you!
You are welcome.