Can't leave add/edit entry page
If I try to leave add/edit entry page by clicking on exit (back-end) or cancel (front-end) button, at the back-end the spinner start moving forever and console show error:
Error
An error has occurred.
0 Call to a member function getInt() on null
at the front end there is no reaction just console show:
Error: Call to undefined method Joomla\CMS\Document\RawDocument::addHeadLink(): Call to a member function getInt() on null
Save and Save&Exit buttons works