sorry, because I am not a Native English Talker
I using Google Translator.
And that is correct.
I used advanced setting and input emulator.
Uninstall(Disabled) the Input Emulator again,
About 10 times I run the Driver4VR,
VRServer error has not occurred about 10 times.
I think that Input Emulator and Driver4VR are interfering with each other.
Advanced setting seems to be okay to use.
think that the current workaround is to not use Input Emulator.
deleted vrserver.txt and got new log again.
I Put it in pastebin.
steamvr.vrsetting #2
https://pastebin.com/hKTU88dg
vrserver.txt #2
https://pastebin.com/KqsZF5Em