assert terminator == b'\r'

I am using the versions:
Python 3.8.5
simpledbf 0.2.6

When I run:
from simpledbf import Dbf5
import pandas as pd

dbf = Dbf5 (b "C: \ Clascon6_Tesomatic \ data \\ Companies.dbf")
db = dbf.to_dataframe ()
I get the error:
assert terminator == b '\ r'
I have read in forums that this problem has occurred to more people, but I have not found any that solve the problem 