What does it mean when Instagram not refreshing the feed?

If Instagram can't refresh feed It means that there are some hurdles that there creating issues such as:
1.Third-party apps
2.Server down
3.Poor connection
4. Old version of the app

Also read:  https://ai.wiki/read-blog/34783_what-are-the-reasons-that-instagram-can-039-t-refresh-feed.html