`[Error 429 - 429] Request rate too high.` On 1st line `rd.open_session`

Hi,
I use to run my Python code lines fie for weeks and it started to break in early Aug.2023, from which point I kept seeing the error `[Error 429 - 429] Request rate too high.`; which is not very sensical since this message appears whern I run the 1st cell (of the whole week) to simply just open my platform session. (FYI: I entereed my coleague's credentials in my config file as a test and it worked fine - so the issue is not with my PC setup.)
It's odd that I get a data limit message when I simply just open the session and don't ask for data too... My product is 'Eikon with DataStream for Office'. I changed my account password to make sure noone else is using it without me knowing (and I do not share my credentials). I also created a new App Key to test, to no avail.