I only fewer than 20 stock symbols in any one portfolio and a total of about 80. So there must be another problem. The problem is with the iPhone app.
I am having this problem on my iPhone 5 as well. When I try to add a new stock to my portfolio the app closes down entirely. I only have a couple dozen stocks in my portfolio. Same thing happens when I hit the search icon on top right of screen. I did try to delete the app and re-install again, but it did not resolve the issue. Please fix this bug soon.
I am having the same issue using Chrome on a desktop computer.
You enter the new Ticker that you want to add to portfolio, and even asks
if you want notifications for the stock, but then the stock ticker never gets
added to the list. This is happening on 1/5/2019