Hi @buff,
With our most recent update (FTS 2.9.6.2), we have no known issues.
To display any Instagram feed, you do need login credentials for that IG account. For The IG Basic token, the IG account needs to be public. For the IG Business token, the IG account needs to be a Business account and linked to a FB Business Page (to which you need admin privileges).
If you are using an Instagram Basic token for your feed, due to FB setting a 2-month expiration, you will be required to get a new access token every two months. Facebook, which now manages the Instagram API, mandates this.
You can use a IG Business token, which expires far less frequently. In order to do this, your IG account must be a Business account and be linked to a FB Business Page (to which you must have admin privileges). You can do this in the free version of the Feed Them Social plugin. But to unlock most features the FTS premium would be needed.
Our developers are working on a complete overhaul of our Feed Them Social plugin suite and are looking to implement an alert system for the expiring IG tokens. However, at this time, we do not have any alert system in place. We will add this to a future update, as it may be our most common issue. Thanks to this FB (IG Basic token) 2 month expiration, we are looking to find a solution on our end.
Back to the issue at hand. If you have any caching plugins installed, please manually clear them. If you are running any FB blocking extensions in your browser (like FB Container in Firefox for example), allow them for your site, or disable the FB Blocker entirely.
And I am assuming the most recent FTS update is running, currently 2.9.6.2. After you have reacquired an IG token, generated a new shortcode, replaced the old shortcode and after update/publish, cleared the FTS cache, if the issue still persists, it’s possible that another plugin or theme may be interfering. Try deactivating all other plugins besides the Feed Them Social plugins temporarily. Then test to see if it works. If this works, try reactivating them, one by one, to see which one is causing the issue.
If deactivating all plugins doesn’t help the issue try switching themes to one of the default WordPress themes then look at the page (this can be done under the Appearance tab of your install). It’s possible the theme is causing errors.
Let us know how it goes.