Hey @sudhir Racheal from the Support Engineer team 👋
Without seeing specific error codes, or user examples here, we typically see this happen on mobile when identity verification isn't properly implemented. Did you recently turn on identity verification for Android and iOS? If you're looking to roll out identity verification on mobile, your users need to have a version of your app that includes the user_hash when logging them in - otherwise, Intercom will reject them when the verification is enforced and they don't submit a hash.
You can change these settings through Settings >> Security >> Enforce identity on iOS/Android.
The link for Android is here 👈
The link for iOS is here 👈