Report: 49ers move practice after footing problems on Levi’s Stadium turf

49ers coach Jim Harbaugh reportedly stopped Wednesday’s practice at Levi’s Stadium and moved the workout to the club’s practice field after the club had footing problems on the stadium’s playing surface. According to Matt Maiocco of CSNBayArea.com, Harbaugh gathered his team after Stevie Johnson fell running a pass route during the workout, which featured “huge…