Lightroom Download Mask doesn't Start (Android)

Hi there, 

I got lightroom on my oneplus 8 pro and wanted to use the Auto Mask for faces and heaven. It tells me that a download of 40/50 MB is necessary, but it does not start when I click the button. 

I have the Premium Version and already tried restarting my device...

Thank you in advance for helping me!

Best regards

Rouven