Hope that helps with the IT people.

I use a desktop computer, and I hate my dumbphone, and I would never buy an iPhone when AT&T gives me a Samsung for free. Of course I am not a millenial. 

Already got back from SA Tech Support and got the problem solved.
The system stops adding new tickers after a total of 400 tickers.
So I deleted some duplicate tickers, and then I was able to add new ones.
Problem solved. Thanks

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

Many Thanks..and please keep up the great work at Seeking Alpha.