Hi Geoffrey –
Sorry to be a squeaky wheel, but I seem to be having the same issue. It was working fine on my site, then I changed twitter accounts (updating all keys and secret numbers), and now I keep getting the same message that the tweets can’t be displayed. I thought maybe it was because my account was set to private so I made it public and that did not change anything. Deactivated and activated. Deleted and reinstalled. And now I feel I need to bother you for help. Any ideas as to what I can do? Yours is the best twitter app out there so I want to keep using it. My website is: https://cameluk.camelblog.com/