Update (Apr 2, 2019): To workaround this issue, please use the tool on our website here. You can then manually connect your account on the plugin’s Settings page.
If you are receiving the following message when trying to connect an Instagram account then this is due to a recently reported issue with the Instagram API. This started to occur on March 29th, 2019, and is affecting some Instagram accounts. We are hoping that Instagram resolves this issue shortly. Once it’s resolved then the account connection process will start working as normal again.
Instagram Connection Error
Due to an issue with the Instagram API some users are experiencing an issue connecting an Instagram account. This is due to an Instagram platform issue which is affecting all developers/apps at the moment and which we are hoping Instagram will resolve very soon.
We are very sorry for the inconvenience!