I cannot delete tickets

I cannot delete tickets

When I was deleting tickets, a popup screen came up every time.
I probably didn't read the popup well, and I ticked the box, supposing this popup box wouldn't appear anymore.
Unfortunately, now I cannot delete my tickets anymore.
I already removed the cookies for the zoho site, but this didn't solve the problem.
Are there other options to solve this problem?

Thanks, Martine