vim cs add GTAGS fail

[weidong]

I create a smb service in linux and use win10 to visit the smb content.
I use gvim8.2 in windows. The PWD in gvim is below.

I use gtags for windows to create GTAGS file.

the GTAGS file create ok.

When I use 'cs add GTAGS' command, the vim show error:


I don't know why this happen.