I'm not sure how recently this started happening but I'd guess it was within the past day or two. While the Instagram feed had been working fine previously, it now shows the errors below:
Warning: file_get_contents(https://api.instagram.com/v1/users/XXXXXX/media/recent/?access_token=XXXXXXX) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 400 BAD REQUEST in XXXXXXXX/wp-content/plugins/feed-them-social/feeds/instagram/instagram-feed.php on line 28 Warning: Invalid argument supplied for foreach() in XXXXXXXXX/wp-content/plugins/feed-them-social/feeds/instagram/instagram-feed.php on line 33
Hopefully my redaction doesn't make this code useless to you.
Possible API issue or maybe Instagram settings on my client's site?