Hi @DJCHEMIE!
I don’t use Ableton, and I don’t have a Softpop (yet) but I’ll try to help.
Do you already have your Minilogue successfully controlling things in Ableton?
If so, did you make sure your Softpop is listening to the right MIDI channel that you want to control it with?
From the reference manual:
“Softpop can receive a MIDI clock to sync the sequencer. Hold the MIDI button and press one of the GATES to set the input channel. Press the selected channel again to select channels 9-16, and the light indication will invert.”
https://bastl-instruments.com/content/files/manual-softpop2-web.pdf pg.38
You could maybe try Minilogue’s MIDI OUT into your Softpop directly too to confirm you could at least control it that way.