Python Pandas can't read .xls file though engine is xlrd

have a 1 GB excel sheet with xls format (old excel), and I can’t read it with pandas df = pd.read_excel("filelocation/filename.xls",engine = "xlrd") XLRDError: Unsupported format, or corrupt file: Expected BOF record; found b'<html>\r\n’ and if removed the engine it sends this error ValueError: Excel file format cannot be determined, you must specify an engine… Read More Python Pandas can't read .xls file though engine is xlrd