RDP libraries: 'Request' object has no attribute 'prepare'

Hi

I am working with a client that has a free trial for ERT Cloud and they are getting the following error message when executing the example "2.3.0 - Content - StreamingPrices - Update DataFrame.ipynb" using the RDP libraries (they are trying to connect to the Cloud, not Eikon or TREP):

2020-09-25 13:44:33,956 - Session session.platform - Thread 140075215456064 | MainThread
EDP Authentication failed. Error code -1 | AttributeError("'Request' object has no attribute 'prepare'",)

Python version is 3.6.8

2020-09-25 13:44:43$ python
Python 3.6.8 |Anaconda, Inc.| (default, Dec 30 2018, 01:22:34)
[GCC 7.3.0] on linux

Any idea ?