Instagram feed not showing up

Hi,

My Instagram feed is not showing up at all. It used to work fine and now it doesn't.

My IG account is linked and 'pull enabled' I have also reset the data as well.

When I click on the block it doesn't allow me to choose an account and has a yellow warning saying:

There is no valid account connected yet. Select an existing connected account from the dropdown, or select Add an Account to connect a new one.

I am unsure how to fix this issue or why it has happened so any assistance would be great as to why this is happening.