Cannot sign into Microsoft account on iOS Error Code: Tuff / Sign In button unresponsive

Device: iPad Air (4th generation)
OS Version: iPadOS 26.6.1
Minecraft Version: 26.62

Issue: Unable to sign into Microsoft account. Initially received Error Code: Tuff when attempting to log in. After enabling Remote Connect, restarting the iPad, testing a cellular hotspot, and doing a clean reinstall of the app, pressing the Sign In button no longer opens a login prompt or responds at all.