Web feed producing error

Hi there. I don’t think this is the proper category for this issue, but I didn’t see a category for “Data Feed” or “Web Feed”.

I’m using a custom web feed and in the last couple days I’ve been receiving this error:

Your web feed requires attention

We have been unable to access the following web feed in a timely manner for the past 48 hours: {WEB_FEED_NAME_HERE}. If used within an email, this can lead to delays or prevent emails from sending completely.

I’ve been getting this on multiple web feeds.

When I “Preview” the web feeds, I receive this error:

Error fetching feed.

The URL specified returned invalid JSON.

Here’s the thing:

1. I’ve checked the server performance for the last 24 hours and there’s no scripts running with an excessive load time. Everything is taking about 1-2 seconds. No 404 or 500 errors either.
2. When I manually check the URL of the web feeds, the data is produced within a second
3. I've validated the JSON data and there’s no issues in the formatting
4. I haven't made any changes to the code which produces the web feeds in about a month

Anyone have any insight into what the issue might be?

Thanks