Upload of load profile leads to incorrect error message

Error message says that there are only 8759 timesteps, even though there are 8760. Load profile is also uploaded correctly, so error message just seems to be wrong (on staging server).

<img width="1522" height="1002" alt="Image" src="https://github.com/user-attachments/assets/2630ae38-9c38-4b1d-8bc8-30d0685f5de6" />