I added a custom code and BB stopped editing

Hello,
I have added a custom code that include jQuery, and then all BB pages stopped editing, i can’t edit anything at all. So, i don’t know how to delete the jQuery code that is making this issue. I have also tried the safemode method and i couldn’t edit anything as well.
Anyone can help me please?
Thanks.

@bencarlo @billy
Can you help me please. Thank you.

Is the jQuery in the Layout JS box or somewhere on the page?