Thanks for reaching out.
Are you a free app user, or do you have an active subscription? What is the Lightroom and Android version?
Please try these steps: Delete caché and all app data > Uninstalling> Reboot the device> Reinstall.
Let us know how it goes.
Realize that uninstalling will cause the loss of unsynced data (images, edits, and presets) for subscribed customers and all data for unsubscribed users.