Unable to generate access token.

[LBwaks]

I have upgraded to version 1.3.0 and now the generate_access_token method is raising a Unable to generate access token error.

File "/home/bwaks/Desktop/tech/Job/views.py", line 418, in MakePaymentView
response = cl.stk_push(phone_number, amount, account_reference, transaction_desc, callback_url)

File "/home/bwaks/Desktop/tech/tech/lib/python3.10/site-packages/django_daraja/mpesa/core.py", line 115, in stk_push
'Authorization': 'Bearer ' + mpesa_access_token(),

File "/home/bwaks/Desktop/tech/tech/lib/python3.10/site-packages/django_daraja/mpesa/utils.py", line 176, in mpesa_access_token
access_token = generate_access_token()

File "/home/bwaks/Desktop/tech/tech/lib/python3.10/site-packages/django_daraja/mpesa/utils.py", line 149, in generate_access_token
raise MpesaError('Unable to generate access token')
django_daraja.mpesa.exceptions.MpesaError: Unable to generate access token