This is my default KDEN airport in the Felis 742 at B38W (there is no plain B38 for me?). Your scenery looks slightly different, confirm it's the default one?
For debugging purposes you can enable the debug mode in the SAM base plugin settings and take a screenshot like this:
The green arrows indicate the jetway calculation, I wonder which color these have in your case.
However I found a really big issue in your log:
SAM 1.0.8 loaded
Loaded: Custom Scenery/KPDX - Portland International/plugins/SAM/win_x64/SAM.xpl (com.stairport-sceneries.sam).
Looks like this scenery is shipping a SAM version which is the worst thing you could have. The old version "fighting" against the new version. You must only have ONE SAM installation and definitely NOT inside a scenery folder.