# Blank page when logging in from Discourse app on iPhone
**URL:** https://meta.discourse.org/t/blank-page-when-logging-in-from-discourse-app-on-iphone/76190
**Category:** Support
**Created:** [December 16, 2017, 1:00am UTC](https://meta.discourse.org/t/blank-page-when-logging-in-from-discourse-app-on-iphone/76190 "2017-12-16T01:00:50Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ffhaddad](https://meta.discourse.org/u/ffhaddad)
#### Post date: [December 16, 2017, 1:00am UTC](https://meta.discourse.org/t/blank-page-when-logging-in-from-discourse-app-on-iphone/76190/1 "2017-12-16T01:00:50Z")
**Since this might be the problem, I’ll start with this.** I recently launched a new EC2 instance and restored a backup of my Discourse site to the instance and deleted the old one. After that, logging in from the Discourse app for my account doesn’t work.
I tried removing the site from the app and adding it back. I get to the authorize link after signing in and then I get a blank screen after clicking authorize. When I checked the logs, I see:
`PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "index_user_api_keys_on_client_id" DETAIL: Key`
I’m not sure what the cause is, but I’m thinking it has something to do with this device already being authorized on the previous site and a server restore?
---
### Author:  [@ffhaddad](https://meta.discourse.org/u/ffhaddad)
#### Post date: [December 17, 2017, 11:01pm UTC](https://meta.discourse.org/t/blank-page-when-logging-in-from-discourse-app-on-iphone/76190/2 "2017-12-17T23:01:26Z")
After uninstalling the Discourse app and reinstalling, everything is working. It might have been a cache issue, not sure.
---
### Author:  [@HAWK](https://meta.discourse.org/u/HAWK)
#### Post date: [December 17, 2017, 11:01pm UTC](https://meta.discourse.org/t/blank-page-when-logging-in-from-discourse-app-on-iphone/76190/3 "2017-12-17T23:01:51Z")