Looks like you have exceeded the maximum of 250 stocks per portfolio OR 400 stocks across all your portfolios.
I see you using an older version of the app. Please update and make sure you install 3.12 or later.
You can access the desktop version of the site by going into the hamburger menu, scroll down to the bottom and tap on the "Desktop Version" link.
Thank you for letting us know - We are working on a fix,
Make sure you upgrade as soon as the new version arrives.
Please kill the app and restart it - Usually that will solve it.
If the problem continues, try reinstalling the app.
Try tapping the "Show All" button at the bottom of the list.
Customer support service by UserEcho