[12th of Dec 11pm EET] Meta has fixed the technical issue and publishing should work now normally. Thank you for your patience and sorry for this inconvenience.
[12th of Dec 7pm EET] Meta is currently experiencing technical issues that might affect publishing posts and stories to Facebook and Instagram when using Hookle.
We are closely monitoring the situation and working to keep disruptions to a minimum. Thank you for your patience and understanding as Meta resolves these issues.