Lines, Components, Groups Won't connect/glued each other

Well, I don’t use SU2024 (because it doesn’t work on my dual-screen laptop due to another critical bug), so I don’t really know what could be the cause of the error you mentioned.

However, I guess, a similar phenomenon was reported in another topic:

https://forums.sketchup.com/t/sup24-snapping-also-broken/312128

Is this the error same you discovered?
Can you share the model file from which you took the screenshot?
What is the exact version build number of your Sketchup? (Menu>Help>About Sketchup)

Can you try to download the very last version of installer from here: Download All | SketchUp | SketchUp, right click on the installer and chose Run as Administrator, then when promoted chose Repair.

Also, please go to Nvidia site and download and install the latest graphic driver.