Flink AI with Azure ML results in "Internal Error"

I am trying to connect a Fraud Detection ML model deployed on Azure ML to my Confluent Flink Streaming Workspace. I successfully set up the connection to AzureML, and created the model on Confluent.
When I try to run my model using:
SELECT * FROM ….my_table, LATERAL TABLE(ML_PREDICT(‘testmodel’, TransactionID, Product, card1, card2, card3,…))
,I get an “Internal Error” without any further specification.
My input consists of 300 features/columns, the output is one boolean.
I reproduced the same steps using Azure OpenAI (with one string-input and one string-output) and didn’t have any problems.
Did anyone experience the same problems or has an idea how to debug? Or at least has an idea how to find any information like proper logs?