It is set to PT. From looking at a couple different hands, the BB walks that do import properly, do not have a SB posted in the hand and the BB's action is "Return uncalled portion of bet" and the pot reads as "$0".
The hands that have the import error are standard hands with a SB and BB and the BB gets a walk. BB's action is "Did not show" and the pot reads as "$SB+BB".
Fwiw, these discrepancies stem from the original Bovada HHs it seems.
There were no problems importing these hands before the latest PT4 update but, if you try to view what would be an error hand now, in PT4, you can't. PT4 opens the Hand Details window and it is blank. Weird.
Not sure how much, if at all, this info helps... Just sharing what I see.
It's not your tool that PT directly hates, its Bovada.