4th-down miscommunication dooms Vikings in loss to 49ers

Minnesota Vikings running back Dalvin Cook (33) is carted off the field during the second half of an NFL football game against the San Francisco 49ers in Santa Clara, Calif., Sunday, Nov. 28, 2021. (AP Photo/Tony Avelar)

Minnesota Vikings quarterback Kirk Cousins (8) reacts during the second half of an NFL football game against the San Francisco 49ers in Santa Clara, Calif., Sunday, Nov. 28, 2021. (AP Photo/Jed Jacobsohn)

San Francisco 49ers cornerback Josh Norman (26) is called for pass interference while defending Minnesota Vikings wide receiver Justin Jefferson (18) during the second half of an NFL football game in Santa Clara, Calif., Sunday, Nov. 28, 2021. (AP Photo/Jed Jacobsohn)

San Francisco 49ers safety Talanoa Hufanga (29) celebrates after an incomplete pass intended for Minnesota Vikings tight end Tyler Conklin, bottom, during the second half of an NFL football game in Santa Clara, Calif., Sunday, Nov. 28, 2021. (AP Photo/Jed Jacobsohn)

Minnesota Vikings quarterback Kirk Cousins (8) walks off the field after the Vikings were defeated by the San Francisco 49ers in an NFL football game in Santa Clara, Calif., Sunday, Nov. 28, 2021. (AP Photo/Tony Avelar)

Minnesota Vikings running back Dalvin Cook (33) fumbles the ball while tackled by San Francisco 49ers defensive tackle Kevin Givens (90) during the second half of an NFL football game in Santa Clara, Calif., Sunday, Nov. 28, 2021. The 49ers recovered the ball. (AP Photo/Tony Avelar)