SQLmap Essential -Case7

Hi to all, I am getting stuck on SQLmap Essential - Case 7. (HTB Academy)

I have been using this to no avail

sqlmap -u ‘’ --batch --dump -T flag7 --level=5 --risk=3 --random-agent --union-cols=1-9 -v 3

and also this where I specify the technique

sqlmap -u ‘’ --batch --dump -T flag7 --level=5 --risk=3 --random-agent --technique=U --union-cols=1-9 -v 3

Can someone give me a nudge on what I am doing wrong?

Thank you

Parse the arguments you specified when you find out how to solve the problem, the solution is on the surface)