i dont have a image ov9281

1.Which seller did you purchase the product(s) from?
amazon
2.The Model number of the product(s) you have purchased?
ov9281
3.Which Platform are you using the product(s) on?
Raspberry Pi 3B+/4B
4.Which instruction are you following?
https://www.arducam.com/docs/cameras-for-raspberry-pi/mipi-camera-modules/camera-userland-driver-sdk-and-examples/
5.Has your product ever worked properly?
no
6.What problems are you experiencing?
I did all the steps

https://www.arducam.com/docs/cameras-for-raspberry-pi/mipi-camera-modules/camera-userland-driver-sdk-and-examples/

but when I send the code (./arducamstill -?) I get a message

When I send this command, didnot respond and i dont have a image

7.What attempts at troubleshooting have you already made?

8.How would you like us to help you?

Dear Customer,

Thanks for your business. Don’t worry and I will try my best to help you.

What’s the error message when you run arducamstill -t 0 command?

Please attach me your detail error message and I will help you check it in detail.