I use moodle 3.2 when i try to customize view of course by add in my custom folder folder call course and page call view.php and add my custom code it worked well but at the end of page i found this errror
Coding error detected, it must be fixed by a programmer: The theme has already been set up for this page ready for output. Therefore, you can no longer change the theme, or anything that might affect what the current theme is, for example, the course.
and when delete this page and return to default view the error disappear
any help please???