My Bot have this issue of Uielement not found after certain hour. How to handle these issue?

Hi @Samraat_Maharjan

Use error handling activities such as Try Catch, Retry Scope, or Check State to handle exceptions and retry actions when a UI element is not found.

You can catch specific exceptions such as UiPath.Core.SelectorNotFoundException or UiPath.Core.ImageOperationException and perform alternative actions or log messages.

You can also use Check State activity to check if an application or UI element is ready before performing an action on it.

Check out the Link

Regards
Gokul