bytes-like object is required not 'str'

[zlaiet]

when i try to run fetch.py i keep getting this error any solution ?

"Traceback (most recent call last):
File "fetch.py", line 205, in
scrapeFacebookPageFeedStatus(page_id, access_token, since_date, until_date)
File "fetch.py", line 144, in scrapeFacebookPageFeedStatus
"num_special"])
TypeError: a bytes-like object is required, not 'str'"