Instagram API is currently experiencing an issue that is impacting all third party apps that prevents direct posting where location tagging is used.
The error message you will receive is the following: Facebook error: Fatal (code -1, subcode 2207001) errorUserTitle=Instagram Platform API Error
Facebook received information about this bug report and assigned it to their team: https://developers.facebook.com/support/bugs/307064806625308/
The next steps on Agorapulse will be: with our next release planned on April 17, we will disable this feature and remove tagged locations from all scheduled and queued items.
In the meantime, our recommendation is to publish the Instagram post without using the location feature.
Once the bug is resolved by Facebook, the option will be back on Agorapulse