runtime error

Traceback (most recent call last): File "/home/user/app/app.py", line 28, in <module> final_colname = uncleaned_data.columns[len(uncleaned_data.columns) - 1] File "/usr/local/lib/python3.10/site-packages/pandas/core/indexes/base.py", line 4604, in __getitem__ return getitem(key) IndexError: index -1 is out of bounds for axis 0 with size 0

Container logs: