When Paula reads the files she places the open side of the red folder that has the paper clip facing out near the table's edge while the side of the folder with the crease is facing in toward the coffee cup. However, in the next immediate cut, the sides of the red folder are now facing the opposite way than previously.
The orientation of the male detective walking behind his desk changes from shot to shot. Before Paula steals Clara's files he is at a certain spot and in the next immediate cut, after she steals the file, he is in a different spot.
Front loading washing machines have a safety switch which prevents opening the door while the drum is in motion.
The key ring in the washing machine is not nearly enough weight to throw the drum out of balance.
When Paula is reading the Spanish newspaper, "Diario OnLine" the date reads Martes, 17 noviembre 2021 which in English it is Tuesday, November 17, 2021. However, the correct day for that date is Wednesday or Miercoles in Spanish. Additionally "noviembre" would be spelled with a capital N.
After the motorcyclist had a violent spill in trying to avoid crashing into the little girl; Símon and his wife take the disorientated child directly to the hospital rather than call and wait for an ambulance. However, no mention is made of how the cyclist fared by the couple or the medical staff at the hospital. The cyclist may have been killed or at least severely injured but this fact was completely ignored thus interrupting the train of thought for the viewer.