Thanks for reaching out. We're sorry for the trouble with Select Subject. We'll need more information to help you with this.
Could you please share the version of Lightroom & android on your device? What device model are you working with?
Do you see an error or pop-up in-app?
Please share more details like screenshots or video recordings of what you see.
What troubleshooting have you tried already?
If you see 'Something Went Wrong' when using Select Subject, please check this community discussion: https://community.adobe.com/t5/lightroom-ecosystem-cloud-based-bugs/p-android-masking-of-subject-or-...
We hope to hear from you soon.