Unfortunately, you deleted the new core activity, not the add-on that you installed.
I feel slightly guilty - I should have made that clear.
To be honest, I would download a new, clean copy of Moodle 3.10 and completely replace your code (just retain config.php).
I feel slightly guilty - I should have made that clear.
To be honest, I would download a new, clean copy of Moodle 3.10 and completely replace your code (just retain config.php).