seven of clubs missing
RGI
REGISTERED
Game: klondike
Game #: 1413564456
Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36 Edg/97.0.1072.69
Window: 1759x877
JS-Version: 2021-07-01_21:53:26_-0700_073f291b2e50363b317f3b2317168846c20d766a
Comments
Fifth column from the left, bottom card.
Just won the game with a score of 52. You can't win with 52 if there are any missing cards. Seven of clubs is not missing now. @Arborist is correct.