In high DPI, the window size is not well adjusted
The window that appears to display the information on the exception is not scaled properly in high DPI mode.

Please provide some technical details. What display do you use? And what the DPI? Please take a look here https://wiki.lazarus.freepascal.org/High_DPI
Well I just go in the dpi settings of the desktop. That’s the Screen.DPI thing in Lazarus
Well I just
You went to DPI Settings in Lazarus (Sreen.DPI) and what you set? Please provide an example project.
No no, it is the system DPI. On my distro, you would go to Appearance settings and change the font DPI. On Windows, it is something like "Make stuff bigger" in the control panel. Screen.DPI gives you the DPI value that is set in the operating system. I am using the sample projects you already provide.
Hier fix for fpc from 3.3.1: Fork