Python RDP StreamingPrices returns no data

I'm trying to process the streaming data from RDP in Python receiving updates on multiple RICs. It seems to me that the only class from the https://pypi.org/project/refinitiv-dataplatform/ library that can handle multiple RICs is StreamingPrices(). Unfortunately when I'm running my code below, I don't receive any data.

streaming_prices = rdp.StreamingPrices(
    universe=['EUR='],
    fields=['BID', 'ASK'],
    on_update=lambda streaming_price, instrument_name, f:
print("Update received for {}: {}".format(instrument_name, f))
)

streaming_prices.open()
while True: time.sleep(0.2)

The log looks as follows:

2020-02-28 09:44:28,347 Login to websocket successful

2020-02-28 09:44:48,347 Receive ping from server ...

2020-02-28 09:44:48,348 ... send pong response

2020-02-28 09:45:08,346 Receive ping from server ...

2020-02-28 09:45:08,346 ... send pong response

...

On the other hand, when I use the ItemStream() class with the following code, it works perfectly. But ItemStream() cannot handle multiple RICs, so it's not a solution to my problem.

streaming_prices = rdp.ItemStream(
    session=rdp.get_default_session(),
    name='EUR=',
    fields=['BID', 'ASK'],
    on_update=lambda s, msg:
    print("Update received: {}".format(msg)))
streaming_prices.open()
while True: time.sleep(0.2)

The log looks the same, but I can see the updates being printed in the console:

Update received: {'ID': 1, 'Type': 'Update', 'UpdateType': 'Unspecified', 'DoNotConflate': True, 'Key': {'Service': 'ELEKTRON_DD', 'Name': 'EUR='}, 'SeqNumber': 43854, 'Fields': {'BID': 1.1029, 'ASK': 1.1033}}

Update received: {'ID': 1, 'Type': 'Update', 'UpdateType': 'Unspecified', 'DoNotConflate': True, 'Key': {'Service': 'ELEKTRON_DD', 'Name': 'EUR='}, 'SeqNumber': 43918, 'Fields': {'BID': 1.103, 'ASK': 1.1033}}

Update received: {'ID': 1, 'Type': 'Update', 'UpdateType': 'Unspecified', 'DoNotConflate': True, 'Key': {'Service': 'ELEKTRON_DD', 'Name': 'EUR='}, 'SeqNumber': 43982, 'Fields': {'BID': 1.103, 'ASK': 1.1033}}

Update received: {'ID': 1, 'Type': 'Update', 'UpdateType': 'Unspecified', 'DoNotConflate': True, 'Key': {'Service': 'ELEKTRON_DD', 'Name': 'EUR='}, 'SeqNumber': 44046, 'Fields': {'BID': 1.1029, 'ASK': 1.1033}}