Greetings Tenno,
Last week we became aware of an issue with the Warframe Companion App for mobile and shared that we were working on fixing the blank screen / infinite loading. We’re happy to report that we have resolved the issue.
You will need to update the app to resolve the issue. There is a chance that the app will not alert you to the fact that an update is available; you’ll need to manually visit your device’s app store to receive the update.
If visiting the Play Store or App Store to update the app does not work, please follow our troubleshooting guide and contact support if you’re still experiencing issues. Please note that this issue was impacting those with console accounts, meaning if you’re a PC Tenno currently experiencing an issue, you’ll want to follow the troubleshooting guide or contact support!