Insert button is not active. There is no drop down menu with block choices

https://learn.www.ads-software.com/workshop/how-to-create-a-post-or-page-with-the-wordpress-block-editor/

this shows that the button is blue and a drop down menu appears

please help me set this up

thank you

the screen shot did not capture the drop down menu
sorry

https://drive.google.com/file/d/1GKoctbaDXMVS1BXS37txxQ-lWaBWdlqu/view?usp=sharing

i hope this works
i got a screen shot of my new page screen web page showing a black insert button instead of the blue one
i cannot access the drop down blocks menu from this dead button