Fatal: Cannot find xlib used by Gtk2Int of package LCL.

[Aruna]

HI, I have a empty form which I just tried to compile and run. And it tells me:

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1. gtk2int.pas(37,6) Fatal: Cannot find xlib used by Gtk2Int of package LCL.

I have attached a screenshot. No, I have not fiddled with anything or changed any settings. I just wanted to start a new project and this happens? Do I ask dpkg to reinstall all over again? Or? Strange thing is after initially installing and testing everything worked just fine. Help!

Oh sorry forgot to mention this below:

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1. aruna@debian:~$ sudo apt install libx11-dev libgtk2.0-dev
2. Reading package lists... Done
3. Building dependency tree... Done
4. Reading state information... Done
5. libx11-dev is already the newest version (2:1.8.4-2+deb12u2).
6. libx11-dev set to manually installed.
7. libgtk2.0-dev is already the newest version (2.24.33-2+deb12u1).
8. 0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.