Different execution result between codebook and python API

Good morning,

I'm using the refintiv.data api to query some bond data.

In the codebook I'm running

rd.discovery.search(
        filter = f"RIC eq '458140BP4=RRPS'",
        select = "MaturityDate"
    )

this runs without issues and gives me the maturity date.

However when i copy paste the same thing in my code editor, i get

ValueError                                Traceback (most recent call last)
<ipython-input-6-2b09bc2fc4a2> in <module>
----> 1 rd.discovery.search(
      2         filter = f"RIC eq '458140BP4=RRPS'",
      3         select="MaturityDate"
      4     )                                                                                                   ValueError: Could not convert object to NumPy datetime

I've been using the API in my code editor for quite some time now, so I know my setup is correct, but i cant understand why the results are different here.