Create an Approval Process

let’s create our own process that ensures a manager approves opportunities that are discounted more than 40%.

I can't complete the Trailhead Approval Process Challenge because the Activate link and button are clickable but don't do anything. I am experiencing the same when trying to delete anything in DE. I can add things but cannot remove, delete, or activate ANYTHING (includes object records). This started last week. Pls Help!!