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RN: Login causes blank screen when using ADFS

Dylan discovered this when testing a community issue: https://forum.mattermost.org/t/mattermost-ios-app-1-8-0-saml-w-adfs-clicking-login-with-saml-button-displays-white-screen/5010

Reproduced on https://ci-linux-postgres.mattermost.com.
Only an issue on RN, doesn't repro on webapp or desktop app.

Repro steps:
1. Set up Mattermost with SAML using ADFS (e.g. on https://ci-linux-postgres.mattermost.com).
2. Start the app (iOS / Android).
3. Choose login method as: With SAML.

Expected:
Login works, no blank screen or errors.

Observed:
Logging in via SAML or via email & password with ADFS causes white screen. Refresh symbol runs permanently.

On other servers, SAML using OneLogin and OKTA do not reproduce the issue.

Sometimes the screen does not stay blank but shows an error (see attached screenshot).

Status

Assignee

Unassigned

Reporter

Amy Blais

Fix versions

Mattermost Team

Apps

QA Assignee

Lindy Isherwood