Unable to upload fotos from Lightroom into Adobe Express

Dear community, 

I want to upload photos from Lightroom to Adobe Express for editing, but I don't know how to connect the programs. I have a paid corporate account (and of course I'm logged into both programs with that account), but in Express I only see the option "Upload from device" and not from anywhere else, such as Lightroom. 
I'm using the Adobe Express Progressive Web App on a Macbook Pro. 

Anyone able to help? 
Thank you and best wishes, Maria