SQL error and Variables

Hi freeCodeCamp,
I followed your video (https://www.youtube.com/watch?v=HXV3zeQKqGY) minute by minute and downloaded popsql and connected to mysql but the thing is, the variables “INT”, “DECIMAL”, “TIMESTAMP” etc. are not highlighted in Popsql. Therefore, when i try to run it it keeps saying ‘failed’ and giving me this code.
" Error: permission denied for schema public

Error Code: 42501"

What am I doing wrong here? Could you please help me on this?
Thank you.