This message indicates an unexpected error on Instagram's side — the platform does not provide further details about the cause. There are a few possible scenarios:
The post includes a location
A location tag may trigger this error without Instagram specifying it. Duplicate the post without the location and try publishing again. If it publishes correctly, the location was the cause.
The post is a Trial Reel published repeatedly
If you are publishing a Trial Reel and have attempted to post the same content multiple times in a short period, Instagram's API may block the request as potential spam. This behavior has been observed when the same Trial Reel is retried several times without waiting between attempts.
In this case, Metricool's flow completes correctly — the media container is created and processed — but Instagram rejects the final publish step. Note that this is not confirmed official behavior from Meta, but it is a likely cause based on how Instagram handles repeated content.
To work around this:
Wait several hours (ideally 24 hours) before retrying the same content.
Try publishing a different video to verify your account and connection are working correctly.
Avoid retrying the same post multiple times in quick succession.
Other causes
If none of the above apply, try publishing again later. If the error persists, contact us through the chat.