Unsupported request error - method type: post

This error may occur when submitting replies to Facebook comments on the social networking side if your reply contains only text.
If there is also an image in the response, another variation of this error may be returned - (#120) Invalid album id.

It is still not completely clear which algorithm is causing this problem, as this bug was reported to Facebook developers back in 2022, but there are still no changes from their side on this issue.
In this case, despite the error, the reply is successfully published to the social network (the message with the image will be published without it).