I can not remove fields from backend, by checking the checkbox of any field and click Remove button does not work, the same when I look at all the Field Groups, when i click the big X is not deleting the field group, also tried to check the corresponding checkbox and select at the dropdown the option Delete, does not work.
I installed jquery Migrate Helper, does not made any fixes, also installed jQuery Updater, does not work.
At the console, when I try to reproduce this, it appears:
Uncaught TypeError: swal.fire is not a function
Do you have any tips on how to fix this? Only the ON/OFF button works, inside the fields.