In my Joomla! site, whenever I try to save the config option of any component I get the following error.
Could not save data. Error: Extension must have a title.
This was working correctly until recently, I even tried switching to a previous DB backup thinking something might have been messed up inside the assets or the extensions table, but still the error persists.
After a lot of digging I found that value id was being passed with POST request, but it somehow was not being received in the controller.
Later I figured that in the /administrator/index.php as a requirement for a certain 3rd party library, I had added the code to unset the $_POST['id'] which was causing the administrator controller to receive everything except the ID for an object on form submit. Once I added the additional check before unseting the id key, everything started working flawlessly.