@lewtun
mhh, it looks like my assumtions about the MultiLabel MultiClass implementation with the Transformers library is missing a detail   I tried to change the code as described 14 in the last post and now I am receiving an exception from 9 frames deep stacktrace:
InvalidArgumentError: 2 root error(s) found.
  (0) Invalid argument:  ValueError: `generator` yielded an element of shape (6,) where an element of shape () was expected.
Traceback (most recent call last):

...

(1) Invalid argument:  ValueError: `generator` yielded an element of shape (6,) where an element of shape () was expected.

I get that the shape is not as expected but is that:

because I am missing a configuration parameter or
because I am using the labels in a wrong way? and if it is the 2nd, how am I supposed to tell the model that multiple labels can be applicable for a single text?

Does anyone have a hint towards what I am doing wrong here?