Hello Alick,
In order to reproduce and investigate the problem, could you please give us some more details about how this error occurs? Maybe you could describe the steps you perform until the error appears. Does the error occur every time you want to add or edit a post or is it something that happens on specific pages? Any additional information that you may provide us would be useful in order to reproduce the problem and try to solve it.
Regards,
Flavia Miclausi
