I only have this solution for 1999 game and the chapters from 2014-2017.

Since "Dreamfall: The Longest Journey (2006)" game i didnt have issues with, so i didnt see any reason to find fixes for.

But for 1999 fix

Simple.

1: Download ScummVM
https://www.scummvm.org/downloads/

2: Start the program after you installed it, add the game to ScummVM, wherever you installed the folder.

3: Play the game

Now for the 2014-2017 fix of "Dreamfall Chapters"
The guide is here, and has better visual image to what to do
https://support.gog.com/hc/en-us/articles/360019775837-Game-does-not-launch-Intel-10th-gen-CPU-or-newer?product=gog

But incase the article where to magically go away, i will copy and paste the text, its what helped me here.

"
Press WinKey+R to open Run window. In it paste:
SystemPropertiesAdvanced

Press Ok.

Next click on Environment Variables...

In the lower frame, System Variables, press New:

And in the fields, paste these values:

Variable Name:
OPENSSL_ia32cap

Variable value:
~0x20000000

Press Ok and close the Environment Variables window. Restart the computer. Try to run the game now.
"

Hope this helped!