You need to give the image uploader an object that it can store the image in, so you need to have a data view or snippet that is passed an object of your "image" entity and then put the image uploader inside that.
Hi, Nick Croonen
You need to store the Image in expenses before You will add the association on the Image entity so Create a microflow take create activity add the association on it call the microflow on Image data view
or
Select the Parameter of Expenses and select the association on image data view then Drag the Image uploader in side the Expenses data view
I hope it will help you
Thank you!