I can't able to take pictures of any documents

Hi Gobinda5C76

Hope you are doing well.

Thank you for posting your query here. Please help me with few details to understand your issue better.

1. Which application you are using?
2. Make and model of your device?
3. Are you getting any error messages?

You can use Adobe Scan. The scan feature requires access to your camera. If prompted, choose Allow. For details, see Settings.

By default, auto-capture is enabled. Turn this setting on and off as follows:

1. Initiate a scan.

2. Tap circle in the mid. 

For more help refer to: https://www.adobe.com/devnet-docs/adobescan/android/en/scan.html#scanning-quick-steps

Let us know how it works at your end. If you have any further queries please feel free to reach out to us. We would be more than happy to assist you.

Regards

Ria