Cannot create some nodes

What happens if you check the “context sensitive” option and try again?

I created a BTTask blueprint successfully, but when I duplicated it and tried to modify, I just can’t create many of the nodes I have created effortlessly before. I restarted the Editor, and poked everywhere, but I’m out of ideas. E.g. here I’m trying to cast “Owner Actor” to AI Controller, and I just can’t create that node. Even though I was able to do that previously, and the blueprint compiles fine! Again, this works in the original BTTask blueprint, but doesn’t work in its copy. Did I miss something when I duplicated the blueprint?

To get casts you need to check the Context Sensitive checkbox.