Getting adobe application missing error and Photoshop not starting

@ANOOP DUTT as @Ged_Traynor and @Lumigraphics pointed out - you have not purchased an official version of Photoshop. A telltale sign is Creative Cloud does not use Application Manager. This is cracked/pirated software. I would lock your credit card and report the site you purchased from here https://www.adobe.com/trust/fraud-prevention.html.

We won't be able support you beyond this advice since this is pirated software.

You almost certainly paid for and downloaded a pirated version. Adobe CC doesn't use the Adobe Application Manager. You need to remove this from your computer and look for another application that will work on older laptops.

No, it was running smoothly but after trial ends Now It's not even opening 
It was giving me the same error in past also but at that my trial was going on and it was running 
But now it's all what I'm getting

@ANOOP DUTT "I have downloaded the 2018 official version and even paid from my credit card from adobe"

Photoshop version 2018 has not been available for some time and Adobe do not provide links to download older unsupported versions

If you have a valid Creative Cloud subscription, you need to consider updating/purchasing a new PC that will run the latest versions