Something went wrong during the connection with Facebook API. Please, try to ref

Hi.

I h’ve eliminated my feed, and when i want to re-configure it, i have this problem “Something went wrong during the connection with Facebook API. Please, try to refresh the page.”

I tried with this https://www.designparc.com/pixel-caffeine-something-went-wrong-during-the-connection-with-facebook-api-please-try-to-refresh-the-page/ but it doesn′t worked.

Can you help me please?