Hi Vasileilos,

On 18/04/2020 09:32, Vasileios Vlachos via trinity-users wrote:
> Gerhard I am able to use only gtk2 components, when I am trying with qt, fpgui or qt5 I am getting various errors. Do I have to install
> additional packages?

Sorry, but I'm away from Trinity for some time now on a gtk2 desktop (Mint Mate) and can not give good advice. But my package maneger gives
me the following packages:

lazarus-ide-gtk2
lazarus-ide-qt-1.8
lazarus-ide-qt5

You might have to install those. Furthermore the https://wiki.freepascal.org/fpGUI page explains how ro install the fpGUI components.

Hope that helps
Gerhard