Confirmed and root-caused. These Rare Quest Dispenser (PC Cafe) quests show complete but their reward data is empty in our data — the reward step was lost when the quest set was generated, so there's nothing to hand out. The fix is to re-emit those reward acts from the reference; it's a data-regeneration job I'm tracking. (The dispenser's own "some of these can no longer be finished" note is expected.)

Fixed on develop (live at next publish). These Premium Road / PC Cafe vending-machine quests had EMPTY reward data — the reward step was dropped when the quest set was generated. I re-derived the authentic completion rewards straight from the v83 Quest.wz Act.img (completion state only): 22 quests regained their rewards (guaranteed items incl. the two ring quests, plus 53 job/prop/gender-gated reward-table rows). The other ~106 empty-reward dispenser quests are genuinely reward-less in v83 (their Act carries no reward), so those are left as-is rather than inventing rewards. Re-test after next publish.

Live in the latest publish — marking this Fixed. Thanks for the report!