"White balance cannot be set" how to get a darker film border for setting white balance?

[yeye]

I posted a new post and I have the same problem.At the beginning, the profile shows embedded or just nothing, and when I perform the update dng, LR prompts"profile missing"
the auto wb is just not work right.It gives a terrible result.

Profile missing with vuescan

I followed the settings in every step, but after importing to LR, the RAW file showed “color”. When I used “update dngs”, it prompted me that the profile was missing. White balance is not working.When I click on the border with a straw,It prompts as follows:Cannot set the white balance here.Please click on a darker neutral area.So I cannot do the next conversion. When I use silverfast, everything works fine. I don’t understand why. [Untitled-4]