Daniel, if you change the microflow settings to pass nothing to the microflow, you also need to edit the selected microflow to remove the parameter which was added to pass the selected record to...
In your situation, there should be no input parameters to your microflow. Hope this helps
Edit: Daniel, if you do not pass an entity to your microflow, you need to delete the parameter like the one highlighted in the image
Hmm I am not sure what I need to do. Where do I need to edit what?