No detailed informations for SharePoint Online errors with correlation ids
In SharePoint Online when there is an error with a correlation id returned, there is no way for uses to follow the issue since no tool is provided to look for the error detailed related to this id, the id only works in on-premise SharePoint environment.

Thanks for your feedback! Although we appreciate your time and effort to give us this feedback, it’s not something we’re planning to do right now. We are looking into exposing more meaningful exceptions, but due technical reasons we cannot expose ULS log information as such like in on-premises.