How can I insert Blocks into my Content?

Hi There I am new to EasyBlog 5, I am trying to use Blocks, but in the Composer Window I dont see any button to insert the Blocks. I already looked at the documentation, but I did not find the way to insert blocks. In my composer I can see only a FIELDS area, but it is empty asking me to select a category and nothing happens after that.

Can you help me with that?

With Best Regards
Bruno Alecrim