Previously i use the 119 version until i noticed that there's new update to ver 120 but when i installed the 120 i always get this error when loading the nodes

Anybody can help?

clean out everything in the wot_temp folder.
The path is something like this:
C:\Users\USERNAME\AppData\Local\Temp\wot_temp
You may have to make hidden folders visible.

thanks a lot it works! i dont have any idea why some of the files is hidden

Good to hear!
Windows hides user folders unless they are public like downloads, videos and such.